K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

7 tháng 7 2017

Đáp án B

Kiến th ức về từ loại

A. lively /'laivli/ (a): sinh động, sống động

B. alive /ə'laɪv/ (a): còn sống

C. life /laɪf/ (n): cuộc sống

D. living /'liviη/ (a): đang sống, đang tồn tại

Căn cứ vào động từ "stay" ta loai phương án C. Vì sau stay + adj.

Cụm từ stay alive: còn sống.

Read the following passage and mark the letter A, B, C, or II to indicate the correct word or phrase that best fits each of the numbered blanks. Some animals hibernate or go into a deep sleep as an adaptation to the cold months of winter. Hibernation is different from normal sleep. During hibernation, an animal seems to be dead. Its metabolism slows down and its body temperature (46) ______. Its heartbeat slows to only two or three beats a minute. Since its bodily processes are so slow, it...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or II to indicate the correct word or phrase that best fits each of the numbered blanks.

Some animals hibernate or go into a deep sleep as an adaptation to the cold months of winter. Hibernation is different from normal sleep. During hibernation, an animal seems to be dead. Its metabolism slows down and its body temperature (46) ______. Its heartbeat slows to only two or three beats a minute. Since its bodily processes are so slow, it needs very little food to stay (47) ______. Some animals which hibernate are toads, skunks, ground squirrels, bees, and bats. Bears sleep during the winter, but they are not (48) ______ hibernators. They wake up when they hear loud noises. Some animals estivate, or go into a deep sleep as an adaptation (49) ______ the hot, dry months of summer. During estivation, an animal's heartbeat and breathing slow down. During estivation, an animal does not glow or move, It does not need to eat because it is not using much energy. Some animals burrow underground, (50) ______ it is cooler, before they begin to estivate. Some aniriials which estivate are reptiles, bees, hedgehogs, frogs, toads, and earthworms.

(Source: https://englishforeveryone.org)

Điền vào số: 46

A. reduces

B. cuts

C. drop

D. discounts

1
11 tháng 7 2019

Đáp án C

Chủ đề SCIENCE

Kiên thức về từ vựng

A. reduce /rɪ'dʒu:s/ (v): giảm                               B. cut /kʌt/ (v): cắt, giảm

C. drop /drɒp/ (v): chảy, rơi, giảm

D. discount /'dɪskaʊnt/ (v): giảm giá, bớt giá, chiết khấu (do trả tiền ngay, hoặc mua số lượng nhiều)

Ta thấy cả 4 phương án đầu có nghĩa là “giảm”. Tuy nhiên, vị trí trống cần điền một nội động từ nên đáp án là C.

Tạm dịch: "Some animals hibernate or go into a deep sleep as an adaptation to the cold months of winter. Hibernation is different from normal sleep. During hibernation, an animal seems to be dead. [ts metabolism slows down and its body temperature (46)______.” (Một số động vật ngủ đông hoặc đi vào trạng thái ngủ sâu như một sự thích nghi với những tháng lạnh của mùa đông. Ngủ đông khác với giấc ngủ bình thường. Trong thời gian ngủ đông, một con vật dường như đã chết. Sự trao đổi chất của nó chậm lại và nhiệt độ cơ thể của nó (46) ______.)

Read the following passage and mark the letter A, B, C, or II to indicate the correct word or phrase that best fits each of the numbered blanks. Some animals hibernate or go into a deep sleep as an adaptation to the cold months of winter. Hibernation is different from normal sleep. During hibernation, an animal seems to be dead. Its metabolism slows down and its body temperature (46) ______. Its heartbeat slows to only two or three beats a minute. Since its bodily processes are so slow, it...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or II to indicate the correct word or phrase that best fits each of the numbered blanks.

Some animals hibernate or go into a deep sleep as an adaptation to the cold months of winter. Hibernation is different from normal sleep. During hibernation, an animal seems to be dead. Its metabolism slows down and its body temperature (46) ______. Its heartbeat slows to only two or three beats a minute. Since its bodily processes are so slow, it needs very little food to stay (47) ______. Some animals which hibernate are toads, skunks, ground squirrels, bees, and bats. Bears sleep during the winter, but they are not (48) ______ hibernators. They wake up when they hear loud noises. Some animals estivate, or go into a deep sleep as an adaptation (49) ______ the hot, dry months of summer. During estivation, an animal's heartbeat and breathing slow down. During estivation, an animal does not glow or move, It does not need to eat because it is not using much energy. Some animals burrow underground, (50) ______ it is cooler, before they begin to estivate. Some aniriials which estivate are reptiles, bees, hedgehogs, frogs, toads, and earthworms.

(Source: https://englishforeveryone.org)

Điền vào số:49

A. with

B. at

C. to

D. on

1
2 tháng 6 2018

Đáp án C

Kiến thức về giới từ

Adaptation to st: thích nghi với cái gì

Tạm dịch: “Some animals estivate, or go into a deep sleep as an adaptation (49) _____ the hot, dry months of summer.” (Một số động vật ngủ hè, hoặc đi vào giấc ngủ sâu như một sự thích nghi (49) _____ những tháng nóng và khô của mùa hè.)

Read the following passage and mark the letter A, B, C, or II to indicate the correct word or phrase that best fits each of the numbered blanks.Some animals hibernate or go into a deep sleep as an adaptation to the cold months of winter. Hibernation is different from normal sleep. During hibernation, an animal seems to be dead. Its metabolism slows down and its body temperature (46) ______. Its heartbeat slows to only two or three beats a minute. Since its bodily processes are so slow, it needs...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or II to indicate the correct word or phrase that best fits each of the numbered blanks.

Some animals hibernate or go into a deep sleep as an adaptation to the cold months of winter. Hibernation is different from normal sleep. During hibernation, an animal seems to be dead. Its metabolism slows down and its body temperature (46) ______. Its heartbeat slows to only two or three beats a minute. Since its bodily processes are so slow, it needs very little food to stay (47) ______. Some animals which hibernate are toads, skunks, ground squirrels, bees, and bats. Bears sleep during the winter, but they are not (48) ______ hibernators. They wake up when they hear loud noises. Some animals estivate, or go into a deep sleep as an adaptation (49) ______ the hot, dry months of summer. During estivation, an animal's heartbeat and breathing slow down. During estivation, an animal does not glow or move, It does not need to eat because it is not using much energy. Some animals burrow underground, (50) ______ it is cooler, before they begin to estivate. Some aniriials which estivate are reptiles, bees, hedgehogs, frogs, toads, and earthworms.

(Source: https://englishforeveryone.org)

Điền vào số: 48

A. factual

B. rightly

C. authentic

D. true

1
10 tháng 2 2018

Đáp án D

Kiến thức về từ vựng

A. factual /'fæktjuəl/ (a): thực sự, căn cứ theo sự thực

B. rightly /’raitli/ (adv): đúng, phải, đúng đắn, có lý, chính đáng, công bằng

C. authentic /ɔ'θentɪk/ (a): đích thực; xác thực

D. true /tru:/ (a): đúng, thật sự

Căn cứ vào danh từ “hibernators” nên vị trí trống cần một tính từ (trước danh từ là tính từ. Ta loại phương án B.

Căn cứ vào nghĩa của câu: “Bears sleep during the winter, but they are not (48)______ hibernators.”(Gấu ngủ trong suốt mùa đông, nhưng chúng không thật sự là động vật ngủ đông.)

Read the following passage and mark the letter A, B, C, or II to indicate the correct word or phrase that best fits each of the numbered blanks. Some animals hibernate or go into a deep sleep as an adaptation to the cold months of winter. Hibernation is different from normal sleep. During hibernation, an animal seems to be dead. Its metabolism slows down and its body temperature (46) ______. Its heartbeat slows to only two or three beats a minute. Since its bodily processes are so slow, it...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or II to indicate the correct word or phrase that best fits each of the numbered blanks.

Some animals hibernate or go into a deep sleep as an adaptation to the cold months of winter. Hibernation is different from normal sleep. During hibernation, an animal seems to be dead. Its metabolism slows down and its body temperature (46) ______. Its heartbeat slows to only two or three beats a minute. Since its bodily processes are so slow, it needs very little food to stay (47) ______. Some animals which hibernate are toads, skunks, ground squirrels, bees, and bats. Bears sleep during the winter, but they are not (48) ______ hibernators. They wake up when they hear loud noises. Some animals estivate, or go into a deep sleep as an adaptation (49) ______ the hot, dry months of summer. During estivation, an animal's heartbeat and breathing slow down. During estivation, an animal does not glow or move, It does not need to eat because it is not using much energy. Some animals burrow underground, (50) ______ it is cooler, before they begin to estivate. Some aniriials which estivate are reptiles, bees, hedgehogs, frogs, toads, and earthworms.

(Source: https://englishforeveryone.org)

Điền vào số: 50

A. that

B. which

C. where

D. what

1
6 tháng 2 2018

Đáp án C

Kiến thức về trạng từ quan hệ

- Where là trạng từ quan hệ, thay thế cho trạng ngữ chỉ nơi chốn

- When là trạng từ quan hệ, thay thế cho trạng ngữ chỉ thời gian

- Why là trạng từ quan hệ, thay thế cho trạng ngữ chỉ lí do

Căn cứ vào dấu phẩy (,) ta loại phương án A (that không dùng sau dấu phẩy)

Căn cứ vào nghĩa của câu: “Some animals burrow underground, (50) ____ it is cooler, before they begin to estivate. Some animals which estivate are reptiles, bees, hedgehogs, frogs, toads, and earthworms.”

(Một số động vật đào hang dưới lòng đất, (50) _____ trời mát hơn, trước khi chúng bắt đầu ngủ hè. Một số động vật ngủ hè là bò sát, ong, nhím, ếch, cóc và giun đất.)

Do đó, ta dùng “where” thay thế cho “underground” nên đáp án là C.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question.All living cells in an animal's body require energy to power the various chemical processes going in inside them. This energy is ultimately supplied by the food that animals eat. These chemical processes are collectively referred to as metabolism, and one of the byproducts of metabolism is heat. Metabolic rates vary significantly between species. Warm-blooded...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question.

All living cells in an animal's body require energy to power the various chemical processes going in inside them. This energy is ultimately supplied by the food that animals eat. These chemical processes are collectively referred to as metabolism, and one of the byproducts of metabolism is heat. Metabolic rates vary significantly between species. Warm-blooded animals (birds and mammals) have metabolic rates about five to ten times higher than those of similarly sized cold-blooded ones (reptiles, amphibians, and fishes). And it is precisely because birds and mammals have such high metabolic rates that they are able to keep their bodies warm.

The terms warm-blooded and cold-blooded are still in everyday use, but they are not entirely precise. Anyone who has handled a snake knows this because a snake’s body actually feels quite warm. But very little of the snake’s body heat originates internally, from its cells, most of it having been supplied from the outside, either by the sun or by a heat lamp. Instead of referring to reptiles as cold-blooded, they are best described as ectothermic, meaning “outside heat”. Similarly, birds and mammals are said to be endothermic, meaning “inside heat”.

There are advantages and disadvantages to each thermal strategy. Reptiles are usually sluggish first thing in the morning, their body temperatures having dropped during the cool of the night. Accordingly, they have to bask in the sun to raise their body temperatures, but once they have warmed up sufficiently, they can go about their business. By altering between the sun when they are too cool, and the shade when they are too warm, many reptiles are able to maintain their body temperatures at optimum levels of about 95°F or more. Endotherms, on the other hand, maintain temperatures of about 98°F all the time, so they are always ready for action.

I used to keep a crocodile. He had very sharp teeth, and I had to be careful how I handled him during the daytime, when he was warm. But I could do whatever I wanted at night, when he was cold, without any fear of being bitten. The obvious disadvantage of being ectothermic is that the animal’s activity levels are dependent upon the environment. But its low metabolic rates mean that it requires far less food, which is an advantage. I used to feed the crocodile a tiny piece of liver once a week, while the family cat demanded three meals every day. We should therefore not think that reptiles are inferior to mammals and birds; they are just different

What does the word “they” in paragraph 2 refer to? 

A. cells 

B. snakes 

C. reptiles 

D. mammals 

1
13 tháng 9 2019

Chọn C

Kiến thức: Đọc hiểu

Giải thích:

Từ “they” ở đoạn 2 nói đến cái gì?

  A. tế bào                  

B. rắn                         

C. loài bò sát              

D. động vật có vú

Thông tin: Instead of referring to reptiles as cold-blooded, they are best described as ectothermic, meaning “outside heat”.

Tạm dịch: Thay vì nói các loài bò sát là loài máu lạnh, chúng tốt nhất nên được gọi là động vật biến nhiệt, có nghĩa là "ngoại nhiệt" (nhiệt từ bên ngoài).

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question.All living cells in an animal's body require energy to power the various chemical processes going in inside them. This energy is ultimately supplied by the food that animals eat. These chemical processes are collectively referred to as metabolism, and one of the byproducts of metabolism is heat. Metabolic rates vary significantly between species. Warm-blooded...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question.

All living cells in an animal's body require energy to power the various chemical processes going in inside them. This energy is ultimately supplied by the food that animals eat. These chemical processes are collectively referred to as metabolism, and one of the byproducts of metabolism is heat. Metabolic rates vary significantly between species. Warm-blooded animals (birds and mammals) have metabolic rates about five to ten times higher than those of similarly sized cold-blooded ones (reptiles, amphibians, and fishes). And it is precisely because birds and mammals have such high metabolic rates that they are able to keep their bodies warm.

The terms warm-blooded and cold-blooded are still in everyday use, but they are not entirely precise. Anyone who has handled a snake knows this because a snake’s body actually feels quite warm. But very little of the snake’s body heat originates internally, from its cells, most of it having been supplied from the outside, either by the sun or by a heat lamp. Instead of referring to reptiles as cold-blooded, they are best described as ectothermic, meaning “outside heat”. Similarly, birds and mammals are said to be endothermic, meaning “inside heat”.

There are advantages and disadvantages to each thermal strategy. Reptiles are usually sluggish first thing in the morning, their body temperatures having dropped during the cool of the night. Accordingly, they have to bask in the sun to raise their body temperatures, but once they have warmed up sufficiently, they can go about their business. By altering between the sun when they are too cool, and the shade when they are too warm, many reptiles are able to maintain their body temperatures at optimum levels of about 95°F or more. Endotherms, on the other hand, maintain temperatures of about 98°F all the time, so they are always ready for action.

I used to keep a crocodile. He had very sharp teeth, and I had to be careful how I handled him during the daytime, when he was warm. But I could do whatever I wanted at night, when he was cold, without any fear of being bitten. The obvious disadvantage of being ectothermic is that the animal’s activity levels are dependent upon the environment. But its low metabolic rates mean that it requires far less food, which is an advantage. I used to feed the crocodile a tiny piece of liver once a week, while the family cat demanded three meals every day. We should therefore not think that reptiles are inferior to mammals and birds; they are just different

Why does the author mention his pet in the last paragraph? 

A. Because he wants to advise on how to handle pets safely

B. Because he wants to say that keeping a reptile as pet is less expensive

C. Because he wants to compare reptiles’ metabolic rates with those of mammals and birds

D. Because he wants to illustrate that ectothermism has both advantages and disadvantages

1
28 tháng 7 2017

Chọn D

Kiến thức: Đọc hiểu

Giải thích:

Tại sao tác giả đề cập đến thú cưng của mình trong đoạn văn cuối?

  A. Bởi vì anh ấy muốn khuyên về cách chạm vào thú cưng an toàn

  B. Bởi vì anh ấy muốn nói rằng nuôi một con bò sát làm thú cưng ít tốn kém hơn

  C. Bởi vì anh ta muốn so sánh tốc độ trao đổi chất của các loài bò sát với các loài động vật có vú và loài chim

  D. Bởi vì anh ta muốn minh họa rằng động vật biến nhiệt có cả ưu điểm và nhược điểm.

Thông tin: I used to keep a crocodile. He had very sharp teeth, and I had to be careful how I handled him during the daytime, when he was warm. But I could do whatever I wanted at night, when he was cold, without any fear of being bitten. The obvious disadvantage of being ectothermic is that the animal’s activity levels are dependent upon the environment. But its low metabolic rates mean that it requires far less food, which is an advantage. I used to feed the crocodile a tiny piece of liver once a week, while the family cat demanded three meals every day.

Tạm dịch: Tôi đã từng nuôi một con cá sấu. Nó có hàm răng rất sắc, và tôi phải cẩn thận với cách tôi chạm vào nó vào ban ngày, khi nó rất nóng. Nhưng tôi có thể làm bất cứ điều gì tôi muốn vào ban đêm, khi nó trở nên lạnh, mà không sợ bị cắn. Nhược điểm r ràng của việc động vật biến nhiệt là mức độ hoạt động của động vật phụ thuộc vào môi trường. Nhưng tỷ lệ trao đổi chất thấp của nó có nghĩa là nó đòi hỏi thực phẩm ít hơn nhiều, đó là một lợi thế. Tôi từng cho cá sấu ăn một miếng gan nhỏ mỗi tuần một lần, trong khi họ nhà mèo yêu cầu ba bữa mỗi ngày.

Dịch bài đọc:

Tất cả các tế bào sống trong một cơ thể động vật đều đòi hỏi năng lượng để cung cấp cho các quá trình hóa học khác nhau hoạt động ở bên trong chúng. Năng lượng này về cơ bản được cung cấp bởi thực phẩm mà động vật ăn. Các quá trình hóa học này được gọi chung là quá trình trao đổi chất và một trong những sản phẩm phụ của quá trình trao đổi chất là nhiệt. Tỷ lệ trao đổi chất khác nhau đáng kể giữa các loài. Động vật máu nóng (chim và động vật có vú) có tỷ lệ trao đổi chất cao hơn khoảng năm đến mười lần so với những loài máu lạnh có kích thước tương tự (bò sát, lưỡng cư và cá). Và chính xác thì vì chim và động vật có vú có tỷ lệ trao đổi chất cao đến mức chúng có thể giữ ấm cơ thể.

Các thuật ngữ máu nóng và máu lạnh vẫn được sử dụng hàng ngày, nhưng chúng không hoàn toàn chính xác. Bất cứ ai đã chạm vào một con rắn đều biết điều này bởi cơ thể rắn thực sự khá là ấm áp. Nhưng rất ít nhiệt cơ thể rắn bắt nguồn từ bên trong, từ các tế bào của nó, phần lớn nhiệt được cung cấp từ bên ngoài, bởi mặt trời hoặc bởi đèn nhiệt. Thay vì nói các loài bò sát là loài máu lạnh, chúng tốt nhất nên được gọi là động vật biến nhiệt, có nghĩa là "ngoại nhiệt" (nhiệt từ bên ngoài). Tương tự như vậy, các loài chim và động vật có vú được cho là động vật đẳng nhiệt, có nghĩa là "nội nhiệt" (nhiệt ở bên trong).

Có những lợi thế và bất lợi cho từng loại thân nhiệt. Loài bò sát thường uể oải vào buổi sáng, nhiệt độ cơ thể chúng giảm xuống do sự mát mẻ ban đêm. Vì vậy, chúng phải phơi mình dưới ánh mặt trời để tăng nhiệt độ cơ thể, nhưng một khi chúng đã ấm lên đủ, chúng có thể tiến hành công việc của mình. Bằng cách thay đổi giữa ánh mặt trời khi quá lạnh và bóng râm khi chúng quá ấm, nhiều loài bò sát có thể duy trì nhiệt độ cơ thể của chúng ở mức tối ưu khoảng 95° F trở lên. Mặt khác, động vật đẳng nhiệt duy trì nhiệt độ khoảng 98° F mọi lúc, vì vậy chúng luôn sẵn sàng hành động.

Tôi đã từng nuôi một con cá sấu. Nó có hàm răng rất sắc, và tôi phải cẩn thận với cách tôi chạm vào nó vào ban ngày, khi trời rất nóng. Nhưng tôi có thể làm bất cứ điều gì tôi muốn vào ban đêm, khi trời lạnh, mà không sợ bị cắn. Nhược điểm r ràng của việc động vật biến nhiệt là mức độ hoạt động của động vật phụ thuộc vào môi trường. Nhưng tỷ lệ trao đổi chất thấp của nó có nghĩa là nó đòi hỏi thực phẩm ít hơn nhiều, đó là một lợi thế. Tôi từng cho cá sấu ăn một miếng gan nhỏ mỗi tuần một lần, trong khi họ nhà mèo yêu cầu ba bữa mỗi ngày. Do đó, chúng ta không nên nghĩ rằng các loài bò sát thua kém động vật có vú và chim; chỉ là chúng khác nhau mà thôi

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question. All living cells in an animal's body require energy to power the various chemical processes going in inside them. This energy is ultimately supplied by the food that animals eat. These chemical processes are collectively referred to as metabolism, and one of the byproducts of metabolism is heat. Metabolic rates vary significantly between species. Warm-blooded...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question.

All living cells in an animal's body require energy to power the various chemical processes going in inside them. This energy is ultimately supplied by the food that animals eat. These chemical processes are collectively referred to as metabolism, and one of the byproducts of metabolism is heat. Metabolic rates vary significantly between species. Warm-blooded animals (birds and mammals) have metabolic rates about five to ten times higher than those of similarly sized cold-blooded ones (reptiles, amphibians, and fishes). And it is precisely because birds and mammals have such high metabolic rates that they are able to keep their bodies warm.

The terms warm-blooded and cold-blooded are still in everyday use, but they are not entirely precise. Anyone who has handled a snake knows this because a snake’s body actually feels quite warm. But very little of the snake’s body heat originates internally, from its cells, most of it having been supplied from the outside, either by the sun or by a heat lamp. Instead of referring to reptiles as cold-blooded, they are best described as ectothermic, meaning “outside heat”. Similarly, birds and mammals are said to be endothermic, meaning “inside heat”.

There are advantages and disadvantages to each thermal strategy. Reptiles are usually sluggish first thing in the morning, their body temperatures having dropped during the cool of the night. Accordingly, they have to bask in the sun to raise their body temperatures, but once they have warmed up sufficiently, they can go about their business. By altering between the sun when they are too cool, and the shade when they are too warm, many reptiles are able to maintain their body temperatures at optimum levels of about 95°F or more. Endotherms, on the other hand, maintain temperatures of about 98°F all the time, so they are always ready for action.

I used to keep a crocodile. He had very sharp teeth, and I had to be careful how I handled him during the daytime, when he was warm. But I could do whatever I wanted at night, when he was cold, without any fear of being bitten. The obvious disadvantage of being ectothermic is that the animal’s activity levels are dependent upon the environment. But its low metabolic rates mean that it requires far less food, which is an advantage. I used to feed the crocodile a tiny piece of liver once a week, while the family cat demanded three meals every day. We should therefore not think that reptiles are inferior to mammals and birds; they are just different

What is the best title of the passage? 

A. Birds and Mammals 

B. Endotherms and Ectotherms

C. Advantages of Entothermism 

D. Common Misconceptions about Reptiles 

1
21 tháng 6 2019

Chọn B

Kiến thức: Đọc hiểu

Giải thích:

Tiêu đề hay nhất cho bài đọc là gì?

  A. Loài chim và động vật có vú                 

B. Động vật đẳng nhiệt và động vật biến nhiệt

  C. Lợi thế của việc đẳng nhiệt                   

D. Quan niệm sai phổ biến về loài bò sát

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question.All living cells in an animal's body require energy to power the various chemical processes going in inside them. This energy is ultimately supplied by the food that animals eat. These chemical processes are collectively referred to as metabolism, and one of the byproducts of metabolism is heat. Metabolic rates vary significantly between species. Warm-blooded...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question.

All living cells in an animal's body require energy to power the various chemical processes going in inside them. This energy is ultimately supplied by the food that animals eat. These chemical processes are collectively referred to as metabolism, and one of the byproducts of metabolism is heat. Metabolic rates vary significantly between species. Warm-blooded animals (birds and mammals) have metabolic rates about five to ten times higher than those of similarly sized cold-blooded ones (reptiles, amphibians, and fishes). And it is precisely because birds and mammals have such high metabolic rates that they are able to keep their bodies warm.

The terms warm-blooded and cold-blooded are still in everyday use, but they are not entirely precise. Anyone who has handled a snake knows this because a snake’s body actually feels quite warm. But very little of the snake’s body heat originates internally, from its cells, most of it having been supplied from the outside, either by the sun or by a heat lamp. Instead of referring to reptiles as cold-blooded, they are best described as ectothermic, meaning “outside heat”. Similarly, birds and mammals are said to be endothermic, meaning “inside heat”.

There are advantages and disadvantages to each thermal strategy. Reptiles are usually sluggish first thing in the morning, their body temperatures having dropped during the cool of the night. Accordingly, they have to bask in the sun to raise their body temperatures, but once they have warmed up sufficiently, they can go about their business. By altering between the sun when they are too cool, and the shade when they are too warm, many reptiles are able to maintain their body temperatures at optimum levels of about 95°F or more. Endotherms, on the other hand, maintain temperatures of about 98°F all the time, so they are always ready for action.

I used to keep a crocodile. He had very sharp teeth, and I had to be careful how I handled him during the daytime, when he was warm. But I could do whatever I wanted at night, when he was cold, without any fear of being bitten. The obvious disadvantage of being ectothermic is that the animal’s activity levels are dependent upon the environment. But its low metabolic rates mean that it requires far less food, which is an advantage. I used to feed the crocodile a tiny piece of liver once a week, while the family cat demanded three meals every day. We should therefore not think that reptiles are inferior to mammals and birds; they are just different

According to the author, the term "cold - blooded" is misleading because "cold - blooded" animals_________. 

A. cannot survive cold temperatures even when being exposed to the sun 

B. are more affected by heat than by cold in any environment 

C. often have a body temperature comparable to that of warm - blooded animals 

D. always have a higher body temperature than the temperature of the environment 

1
22 tháng 3 2018

Chọn C

Kiến thức: Đọc hiểu

Giải thích:

Theo tác giả, thuật ngữ "máu lạnh" là dễ gây nhầm lẫn vì động vật "máu lạnh"_________

  A. không thể tồn tại ở nhiệt độ lạnh ngay cả khi tiếp xúc với ánh nắng mặt trời.

  B. bị ảnh hưởng nhiều bởi nhiệt hơn là lạnh trong mọi môi trường.

  C. thường có nhiệt độ cơ thể được so sánh với nhiệt độ cơ thể động vật máu nóng.

          D. luôn có nhiệt độ cơ thể cao hơn nhiệt độ môi trường

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question.All living cells in an animal's body require energy to power the various chemical processes going in inside them. This energy is ultimately supplied by the food that animals eat. These chemical processes are collectively referred to as metabolism, and one of the byproducts of metabolism is heat. Metabolic rates vary significantly between species. Warm-blooded...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the question.

All living cells in an animal's body require energy to power the various chemical processes going in inside them. This energy is ultimately supplied by the food that animals eat. These chemical processes are collectively referred to as metabolism, and one of the byproducts of metabolism is heat. Metabolic rates vary significantly between species. Warm-blooded animals (birds and mammals) have metabolic rates about five to ten times higher than those of similarly sized cold-blooded ones (reptiles, amphibians, and fishes). And it is precisely because birds and mammals have such high metabolic rates that they are able to keep their bodies warm.

The terms warm-blooded and cold-blooded are still in everyday use, but they are not entirely precise. Anyone who has handled a snake knows this because a snake’s body actually feels quite warm. But very little of the snake’s body heat originates internally, from its cells, most of it having been supplied from the outside, either by the sun or by a heat lamp. Instead of referring to reptiles as cold-blooded, they are best described as ectothermic, meaning “outside heat”. Similarly, birds and mammals are said to be endothermic, meaning “inside heat”.

There are advantages and disadvantages to each thermal strategy. Reptiles are usually sluggish first thing in the morning, their body temperatures having dropped during the cool of the night. Accordingly, they have to bask in the sun to raise their body temperatures, but once they have warmed up sufficiently, they can go about their business. By altering between the sun when they are too cool, and the shade when they are too warm, many reptiles are able to maintain their body temperatures at optimum levels of about 95°F or more. Endotherms, on the other hand, maintain temperatures of about 98°F all the time, so they are always ready for action.

I used to keep a crocodile. He had very sharp teeth, and I had to be careful how I handled him during the daytime, when he was warm. But I could do whatever I wanted at night, when he was cold, without any fear of being bitten. The obvious disadvantage of being ectothermic is that the animal’s activity levels are dependent upon the environment. But its low metabolic rates mean that it requires far less food, which is an advantage. I used to feed the crocodile a tiny piece of liver once a week, while the family cat demanded three meals every day. We should therefore not think that reptiles are inferior to mammals and birds; they are just different

What can be inferred from the passage? 

A. Reptiles cannot absorb energy from the surrounding environment

B. Endothermic animals are more active than ectothermic animals

C. Maintaining a high metabolic rate requires lots of fuel in the form of food

D. Reptiles cannot function properly and survive if there is no sun

1
16 tháng 10 2018

Chọn D

Kiến thức: Đọc hiểu

Giải thích:

Điều gì có thể được suy ra từ bài đọc?

  A. Loài bò sát không thể hấp thụ năng lượng từ môi trường xung quanh

  B. Động vật đẳng nhiệt hoạt động nhanh nhẹn hơn động vật ngoài nhiệt

  C. Duy trì tỉ lệ trao đổi chất cao đòi hỏi rất nhiều năng lượng dưới dạng thức ăn

  D. Loài bò sát không thể hoạt động một cách thực sự và sống sót nếu không có mặt trời

Thông tin: Reptiles are usually sluggish first thing in the morning, their body temperatures having dropped during the cool of the night. Accordingly, they have to bask in the sun to raise their body temperatures, but once they have warmed up sufficiently, they can go about their business.

Tạm dịch: Loài bò sát thường uể oải vào buổi sáng, nhiệt độ cơ thể chúng giảm xuống do sự mát mẻ ban đêm. Vì vậy, chúng phải phơi mình dưới ánh mặt trời để tăng nhiệt độ cơ thể, nhưng một khi chúng đã ấm lên đủ, chúng có thể tiến hành công việc của mình