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29 tháng 6 2021

29 T

30 T

31 T

32 F

1 D

2 B

29 tháng 6 2021

29. T

30. T

31. T

32. F

1B 2B

Read the passage carefully, then choose the correct answers. A tsunami is a natural disaster more devastating than earthquakes, tornadoes or any other disaster you can think of. Tsunami is a Japanese word that means harbor wave. A tsunami happens when huge waves are formed after something under the ocean occurs to make these large waves form. Erupting volcanoes can also cause tsunamis to occur. The waves start in one area but they move quickly in all different directions once the tsunami...
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Read the passage carefully, then choose the correct answers.
A tsunami is a natural disaster more devastating than earthquakes, tornadoes or any other disaster you can think of. Tsunami is a Japanese word that means harbor wave. A tsunami happens when huge waves are formed after something under the ocean occurs to make these large waves form. Erupting volcanoes can also cause tsunamis to occur. The waves start in one area but they move quickly in all different directions once the tsunami begins. Tsunamis begin as an under the water earthquake. The force of the earth moving causes the water to move and produce huge waves. Waves from tsunami cam travel through the water as fast as 500 miles per hour. As they approach the coast, they continue to grow in size before smashing down on the cities and towns along the coastline. These waves can often be as high as 100 feet, causing much destruction.
32. What is a tsunami?
a. A series of huge waves c. A sudden gust of wind b. A storm with strong winds d. A violent shaking of earth's surface
33. Which is the most diastrous, according to the passage?
a. Earthquake b. Tornado c. Tsunami d. hurricane
34. Which can cause a tsunami to occur?
a. Droughts b. Floods c. Hurricanes d. Volcanic eruptions
35. What happens to a tsunami as it approaches the coast?
a. It changes direction.
b. It decreases the height.
c. It grows in size.
d. It moves more quickly
36. What happens when a tsunami hits land?
a. It devastates coastal regions.
b. It causes underwater earthquake.
c. It blows everything out to sea.
d. It sucks up everything in its path.

1
16 tháng 2 2019

Read the passage carefully, then choose the correct answers.
A tsunami is a natural disaster more devastating than earthquakes, tornadoes or any other disaster you can think of. Tsunami is a Japanese word that means harbor wave. A tsunami happens when huge waves are formed after something under the ocean occurs to make these large waves form. Erupting volcanoes can also cause tsunamis to occur. The waves start in one area but they move quickly in all different directions once the tsunami begins. Tsunamis begin as an under the water earthquake. The force of the earth moving causes the water to move and produce huge waves. Waves from tsunami cam travel through the water as fast as 500 miles per hour. As they approach the coast, they continue to grow in size before smashing down on the cities and towns along the coastline. These waves can often be as high as 100 feet, causing much destruction.
32. What is a tsunami?
a. A series of huge waves c. A sudden gust of wind b. A storm with strong winds d. A violent shaking of earth's surface
33. Which is the most diastrous, according to the passage?
a. Earthquake b. Tornado c. Tsunami d. hurricane
34. Which can cause a tsunami to occur?
a. Droughts b. Floods c. Hurricanes d. Volcanic eruptions
35. What happens to a tsunami as it approaches the coast?
a. It changes direction.
b. It decreases the height.
c. It grows in size.
d. It moves more quickly
36. What happens when a tsunami hits land?
a. It devastates coastal regions.
b. It causes underwater earthquake.
c. It blows everything out to sea.
d. It sucks up everything in its path.

(23-28) Choose the word or phrase that best fits the blank space in the following passage: A volcano is an opening in the earth’s surface through (23)___________ lava, hot, gases and rock fragments erupt. (24) ________ an opening occurs when melted rock from deep within the earth blasts through the surface. Most volcanoes are a top mountains, particularly cone-shaped mountains. The mountains themselves are also called volcanoes. Eruptions of volcanic mountains are spectacular sights. In some...
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(23-28) Choose the word or phrase that best fits the blank space in the following passage:

A volcano is an opening in the earth’s surface through (23)___________ lava, hot, gases and rock fragments erupt. (24) ________ an opening occurs when melted rock from deep within the earth blasts through the surface. Most volcanoes are a top mountains, particularly cone-shaped mountains. The mountains themselves are also called volcanoes. Eruptions of volcanic mountains are spectacular sights. In some eruptions, huge fiery clouds rise over the mountain, and growing rivers of lava flow down (25) _________ sides. In other eruptions, red- hot ash and cinders shoot out the mountaintop, and large chunks of hot rockare blasted (26) ________ into the air. A few eruptions are so ( 27) _________ that they blow the mountain apart. Some eruptions occur on volcanic islands. Such islands are the tops of volcanic mountains that have been built (28) __________ from the ocean floor by repeated eruptions. Othereruptions occur along narrow cracks in the ocean floor.

23/ A. which B. that C. where D. when

24/ A. So B. Such C. That D. Many

25/ A. its B. it C. their D. theirs

26/ A. high B. low C. below D. above

27/ A. gentle B. violent C. terrible D. awful

28/ A. up B. on C. into D. onto

(29-32) Read the dialogue and then decide whether the statements that follow are true or false. Write True or False in your answersheet:

Bad weather comes in many different forms. One kind of bad weather is the tornado. It is one of the most destructive storms that we have on the earth. A tornado is a long cloud which comes down from the sky. It is shaped like a funnel and consists of windwhich whirls around and around extremely fast. In fact, the wind can reach a speed of more than nine hundred kilometers per hour. Weather scientists are unable to know exactly when a tornado will occur. Fortunately, the tornado is not usually very big and it does not last long. There are about two hundred tornadoes annually in the United States, but in some years there are many more. Tornadoes that occur over water are called waterspouts

____ 29/ One good thing about a tornado is that it does not last long

____ 30/ Tornadoes over water are called funnels.

____ 31/ The annually number of tornadoes in the United States is about one hundred.

____ 32/ There are about two hundred tornadoes in one year in America

2
23 tháng 8 2019

23/ A. which B. that C. where D. when

24/ A. So B. Such C. That D. Many

25/ A. its B. it C. their D. theirs

26/ A. high B. low C. below D. above

27/ A. gentle B. violent C. terrible D. awful

28/ A. up B. on C. into D. onto

__T__ 29/ One good thing about a tornado is that it does not last long

__F__ 30/ Tornadoes over water are called funnels.

__F__ 31/ The annually number of tornadoes in the United States is about one hundred.

__T__ 32/ There are about two hundred tornadoes in one year in America

23 tháng 8 2019

Hỏi đáp Tiếng anh

. I don't expect much traffic, but ________ there is, I think we should leave early. A. in case B. in case of C. in time D. in a hurry 27. Although Tom’s grandmother doesn’t _____ weather forecasts, she likes watching them. A. experience B. trust C. expect D. predict 28. An area of land with hills or mountains is called the _______. A. regions B. territories C. highlands D. environment 29. They are going to a park ______ the other side of Saigon Bridge. A. in B. on C. at D. to 30. The...
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. I don't expect much traffic, but ________ there is, I think we should leave early.

A. in case B. in case of C. in time D. in a hurry

27. Although Tom’s grandmother doesn’t _____ weather forecasts, she likes watching them.

A. experience B. trust C. expect D. predict

28. An area of land with hills or mountains is called the _______.

A. regions B. territories C. highlands D. environment

29. They are going to a park ______ the other side of Saigon Bridge.

A. in B. on C. at D. to

30. The word “typhoon” comes ______ the Chinese language, doesn’t it ?

A. from B. for C. about D. with

31. The accident ______ while he was driving to the office.

A. occurred B. was occur C. was occurred D. was being occurred

32. That important event ______ in 1945.

A. happened B. happening C. was happened D. has happened

33. She was having a rest when the volcano _______ .

A. erupted B. flew C. flowed D. broke

34. Two hundred people died in that volcano ______.

A. corruption B. eruption C. destruction D. reduction

35. Tidal waves are the result of an _______ shift in the underwater movement of the Earth .

A. amazing B. alternative C. abrupt D. unpleasant

36.________are funnel-shaped storms passing overland below a thunderstorm.

A. Earthquakes B. Tropical storms C. Hurricanes D. Tornadoes

37. In 1995 , a huge earthquake struck Kobe city in Japan and caused severe _______

A. damage B. destruction C. shift D. collapse

38. The earthquake _______ the city at 2 this morning

A. occurred B. hit C. swept D. measured

39. Thousands of people were saved because scientists had__them about the volcanic eruption.

A. said B. spoke C. warned D. talked

40. A tropical storm which reaches 120 kilometers an hour is called a _______ in North and South America.

A. typhoon B. cyclone C. hurricane D. tornado

41. Ninety percent of earthquakes occur _______ the Pacific Rim.

A. around B. at C. in D. about

42. The roof ________ under the weight of snow last night.

A. collapsed B. fell C. dropped D. flew

43. A tornado looks like a big, dark _______ coming from the bottom of a storm cloud.

A. funnel B. bowl C. mushroom D. cloud

44. Early warnings about tornadoes could save many __________.

A.lives B. life C. living D. things

45. Yesterday a typhoon _________ a coastal city in the country.

A. hit B. strike C.collapsed D. predicted

46. People can know when a volcano will ________ nowadays, can't they ?

A. break B. warn C. erupt D. seek

47. A tropical storm is called a hurricane in North and South America when it _____ 120 kilometers per hour.

A. reaches B. goes C. gets D. comes

48. A ____ is a very large wave.

A. tidal wave B. tsunami C. tornado D. a and b are correct.

49. A / An __________ is a sudden strong shaking of the ground.

A. snowstorm B. tidal wave C. earthquake D. volcano.

50. A _______ is a tropical storm with strong winds.

A. typhoon B. tornado C. volcano D. tsunami

1
4 tháng 3 2018

. I don't expect much traffic, but ________ there is, I think we should leave early.

A. in case B. in case of C. in time D. in a hurry

27. Although Tom’s grandmother doesn’t _____ weather forecasts, she likes watching them.

A. experience B. trust C. expect D. predict

28. An area of land with hills or mountains is called the _______.

A. regions B. territories C. highlands D. environment

29. They are going to a park ______ the other side of Saigon Bridge.

A. in B. on C. at D. to

30. The word “typhoon” comes ______ the Chinese language, doesn’t it ?

A. from B. for C. about D. with

31. The accident ______ while he was driving to the office.

A. occurred B. was occur C. was occurred D. was being occurred

32. That important event ______ in 1945.

A. happened B. happening C. was happened D. has happened

33. She was having a rest when the volcano _______ .

A. erupted B. flew C. flowed D. broke

34. Two hundred people died in that volcano ______.

A. corruption B. eruption C. destruction D. reduction

35. Tidal waves are the result of an _______ shift in the underwater movement of the Earth .

A. amazing B. alternative C. abrupt D. unpleasant

36.________are funnel-shaped storms passing overland below a thunderstorm.

A. Earthquakes B. Tropical storms C. Hurricanes D. Tornadoes

37. In 1995 , a huge earthquake struck Kobe city in Japan and caused severe _______

A. damage B. destruction C. shift D. collapse

38. The earthquake _______ the city at 2 this morning

A. occurred B. hit C. swept D. measured

39. Thousands of people were saved because scientists had__them about the volcanic eruption.

A. said B. spoke C. warned D. talked

40. A tropical storm which reaches 120 kilometers an hour is called a _______ in North and South America.

A. typhoon B. cyclone C. hurricane D. tornado

41. Ninety percent of earthquakes occur _______ the Pacific Rim.

A. around B. at C. in D. about

42. The roof ________ under the weight of snow last night.

A. collapsed B. fell C. dropped D. flew

43. A tornado looks like a big, dark _______ coming from the bottom of a storm cloud.

A. funnel B. bowl C. mushroom D. cloud

44. Early warnings about tornadoes could save many __________.

A.lives B. life C. living D. things

45. Yesterday a typhoon _________ a coastal city in the country.

A. hit B. strike C.collapsed D. predicted

46. People can know when a volcano will ________ nowadays, can't they ?

A. break B. warn C. erupt D. seek

47. A tropical storm is called a hurricane in North and South America when it _____ 120 kilometers per hour.

A. reaches B. goes C. gets D. comes

48. A ____ is a very large wave.

A. tidal wave B. tsunami C. tornado D. a and b are correct.

49. A / An __________ is a sudden strong shaking of the ground.

A. snowstorm B. tidal wave C. earthquake D. volcano.

50. A _______ is a tropical storm with strong winds.

A. typhoon B. tornado C. volcano D. tsunami

Read the passage below then pick out ONE best option (A, B, C or D . to complete each of the following sentences:Britain is now a highly industrialized country and there are only 238,000 farms in the UK. More and more farmers leave the land because they can not earn enough money to survive. Only large farms are economic and because of this most British farm are big. They usually grow cereals in the east of England and raise sheep and cowsin the north of England and Scotland. The small family...
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Read the passage below then pick out ONE best option (A, B, C or D . to complete each of the following sentences:

Britain is now a highly industrialized country and there are only 238,000 farms in the UK. More and more farmers leave the land because they can not earn enough money to survive. Only large farms are economic and because of this most British farm are big. They usually grow cereals in the east of England and raise sheep and cowsin the north of England and Scotland. The small family farms often have to earn more money by offering bed and breakfast accommodation to tourists.

Farming methods in Britain have also changed. Fields used to be quite small, divided by hedges which were sometimes a thousand years old and full of wild flowers and birds. Many hedges were pulled up to allow farmers to use mordern machinery. Now most fields in England are large by European standards.

British farmers give up working on their farms because________ .

A. they are tired of the farm work

B. they can’t earn their own living by farming

C. they want to continue to live

D. they are forced to leave the land

1
28 tháng 8 2019

Đáp án: B

Thông tin: More and more farmers leave the land because they can not earn enough money to survive.

Dịch: Ngày càng có nhiều nông dân rời bỏ đất vì họ không thể kiếm đủ tiền để tồn tại.

VI. Choose the word or phrase (a, b, c, or d) that best firs the blank space in the following passage. The wind controls our planet's weather and climate, but how much do we understand about this complex (31)_________, which can kill and spread fear? On the night of 15 October 1987, the south of England was (32)_________ by the strongest winds it had known for over two hundred years. (33) _______of over 130 km/h blew through the region. Nineteen people were killed, $1,5 billicn-worth of...
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VI. Choose the word or phrase (a, b, c, or d) that best firs the blank space in the following passage.
The wind controls our planet's weather and climate, but how much do we understand about this complex (31)_________, which can kill and spread fear? On the night of 15 October 1987, the south of England was (32)_________ by the strongest winds it had known for over two hundred years. (33) _______of over 130 km/h blew through the region. Nineteen people were killed, $1,5 billicn-worth of (34)___________ was caused and 19-million trees were (35)_______ in just a few hours
Although people thought of this as a hurricane, the winds of 1987 were only (36)_______ storm force. They are far better known than the much more serious storms of 25 January 1990, (37)_________most of Britain was hit by daytime winds of up to 173 km/h. On this (38)_________,47 people were killed, even though, (39)_________ in 1987, the weather forecasters issued accurate (40) ______
31. a. air b. climate c. weather d. force
32. a. occured b. caused c. struck d. destroyed
33. a. Gusts b. Blows c. Hits d. Clouds
34. a. hurt b. damage c. injury d. destruction
35. a. let down b. cut down c. blown down d. fallen down
36. a. severe b. serious c. powerful d. dangerous
37. a. that b. where c. which d. when
38. a. occasion b. incident c. accident d. event
39. a. like b. as c. likely d. unlike
40. a. warnings c. news d. signs b. treats

1
2 tháng 4 2019

The wind controls our planet's weather and climate, but how much do we understand about this complex (31)_________, which can kill and spread fear? On the night of 15 October 1987, the south of England was (32)_________ by the strongest winds it had known for over two hundred years. (33) _______of over 130 km/h blew through the region. Nineteen people were killed, $1,5 billicn-worth of (34)___________ was caused and 19-million trees were (35)_______ in just a few hours
Although people thought of this as a hurricane, the winds of 1987 were only (36)_______ storm force. They are far better known than the much more serious storms of 25 January 1990, (37)_________most of Britain was hit by daytime winds of up to 173 km/h. On this (38)_________,47 people were killed, even though, (39)_________ in 1987, the weather forecasters issued accurate (40) ______
31. a. air b. climate c. weather d. force.
32. a. occured b. caused c. struck. d. destroyed
33. a. Gusts. b. Blows c. Hits d. Clouds
34. a. hurt b. damage. c. injury d. destruction
35. a. let down b. cut down c. blown down. d. fallen down
36. a. severe. b. serious c. powerful d. dangerous
37. a. that b. where c. which d. when.
38. a. occasion. b. incident c. accident d. event
39. a. like b. as c. likely d. unlike.
40. a. warnings. c. news d. signs b. treats

VI. Choose the word or phrase (a, b, c, or d) that best firs the blank space in the following passage. The wind controls our planet's weather and climate, but how much do we understand about this complex (31)_________, which can kill and spread fear? On the night of 15 October 1987, the south of England was (32)_________ by the strongest winds it had known for over two hundred years. (33) _______of over 130 km/h blew through the region. Nineteen people were killed, $1,5 billicn-worth of...
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VI. Choose the word or phrase (a, b, c, or d) that best firs the blank space in the following passage.
The wind controls our planet's weather and climate, but how much do we understand about this complex (31)_________, which can kill and spread fear? On the night of 15 October 1987, the south of England was (32)_________ by the strongest winds it had known for over two hundred years. (33) _______of over 130 km/h blew through the region. Nineteen people were killed, $1,5 billicn-worth of (34)___________ was caused and 19-million trees were (35)_______ in just a few hours
Although people thought of this as a hurricane, the winds of 1987 were only (36)_______ storm force. They are far better known than the much more serious storms of 25 January 1990, (37)_________most of Britain was hit by daytime winds of up to 173 km/h. On this (38)_________,47 people were killed, even though, (39)_________ in 1987, the weather forecasters issued accurate (40) ______
31. a. air b. climate c. weather d. force
32. a. occured b. caused c. struck d. destroyed
33. a. Gusts b. Blows c. Hits d. Clouds
34. a. hurt b. damage c. injury d. destruction
35. a. let down b. cut down c. blown down d. fallen down
36. a. severe b. serious c. powerful d. dangerous d. when d. event d. unlike

37. a. that b. where c. which
38. a. occasion b. incident c. accident
39. a. like b. as c. likely
40. a. warnings c. news d. signs b. treats

1
30 tháng 3 2019

VI. Choose the word or phrase (a, b, c, or d) that best firs the blank space in the following passage.
The wind controls our planet's weather and climate, but how much do we understand about this complex (31)_________, which can kill and spread fear? On the night of 15 October 1987, the south of England was (32)_________ by the strongest winds it had known for over two hundred years. (33) _______of over 130 km/h blew through the region. Nineteen people were killed, $1,5 billicn-worth of (34)___________ was caused and 19-million trees were (35)_______ in just a few hours
Although people thought of this as a hurricane, the winds of 1987 were only (36)_______ storm force. They are far better known than the much more serious storms of 25 January 1990, (37)_________most of Britain was hit by daytime winds of up to 173 km/h. On this (38)_________,47 people were killed, even though, (39)_________ in 1987, the weather forecasters issued accurate (40) ______
31. a. air b. climate c. weather d. force
32. a. occured b. caused c. struck d. destroyed
33. a. Gusts b. Blows c. Hits d. Clouds
34. a. hurt b. damage c. injury d. destruction
35. a. let down b. cut down c. blown down d. fallen down
36. a. severe b. serious c. powerful d. dangerous .

37. a. that b. where c. which dwhen
38. a. occasion b. incident c. accident d. event
39. a. like b. as c. likely d. unlike
40. a. warnings c. news d. signs b. treats

16 tháng 2 2019

Floods cause(24)_____widespread____damage. Unfortuniately, there is little we can do to (25)____prevent___ flooding in some situations. There are several causes for (26)_____flooding_____ including deep snow melt, icy rivers, and broken (27)___dams___. First, when with the deep snow melts it creates, large amounts of water. When heavy rain and sudden warm temperatures (28)___combine___with deep snow , floods can occur. Second, the ice (29) ____pieces____form dams which break and cause flooding. Third, (30) ___human-made____dams can break and cause devastating damage. The water from these dams can be as powerful as a tidal wave. Our best plan of attack (31)____against_____ flooding is to recognize the potential for flooding in certain conditions

A tornado is a tube of spinning air that touches the ground. Wind inside the tornado, spinning very fast, makes tornadoes very dangerous.Tornadoes mostly happen during very strong thunderstorms. They cause a lot of damage to anything they touch. People die every year from tornadoes .Tornadoes are ranked on the Fujita scale, from F0 to F5. Fo has the lowest wind speed, and F5 has the highest wind speed. The United States of America has the most tornadoes every year, but tornadoes can happen in...
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A tornado is a tube of spinning air that touches the ground. Wind inside the tornado, spinning very fast, makes tornadoes very dangerous.Tornadoes mostly happen during very strong thunderstorms. They cause a lot of damage to anything they touch. People die every year from tornadoes .Tornadoes are ranked on the Fujita scale, from F0 to F5. Fo has the lowest wind speed, and F5 has the highest wind speed.

The United States of America has the most tornadoes every year, but tornadoes can happen in any country. If a tornado is coming, the sfest thing to do is go to a basement or a bathroom with no windows. People should never be in a car a mobile home when there is a tornado near.

1. What does the word " spinning" in line 1 mean?

A. movin around B. running slowly C. speeding up D. turning left

2. When do tornadoes mostly happen ?

A. during weak storms B. during strong thunderstorms

C. during strong thunderstorms D. on te gujita scale

3. Where should we hide if a tornadoes comes?

A. in a car B. in a basoment C. in a bathroom with windows D. in a mobile home

4. which of the following sences is NOT true ?

A. many people are killed by tornadoes every year.

B. there are six scales to rank tornadoes every year.

C. F1 has higher wind speed than F2

D. America has the most tornadoes every year

1
21 tháng 10 2019

A tornado is a tube of spinning air that touches the ground. Wind inside the tornado, spinning very fast, makes tornadoes very dangerous.Tornadoes mostly happen during very strong thunderstorms. They cause a lot of damage to anything they touch. People die every year from tornadoes .Tornadoes are ranked on the Fujita scale, from F0 to F5. Fo has the lowest wind speed, and F5 has the highest wind speed.

The United States of America has the most tornadoes every year, but tornadoes can happen in any country. If a tornado is coming, the sfest thing to do is go to a basement or a bathroom with no windows. People should never be in a car a mobile home when there is a tornado near.

1. What does the word " spinning" in line 1 mean?

A. movin around

B. running slowly

C. speeding up

D. turning left

2. When do tornadoes mostly happen ?

A. during weak storms

B. during strong thunderstorms

C. during strong thunderstorms

D. on te gujita scale

( hai đáp án trùng )

3. Where should we hide if a tornadoes comes?

A. in a car

B. in a basoment

C. in a bathroom with windows

D. in a mobile home

4. which of the following sences is NOT true ?

A. many people are killed by tornadoes every year.

B. there are six scales to rank tornadoes every year.

C. F1 has higher wind speed than F2

D. America has the most tornadoes every year

Dịch văn bản sau sang Tiếng Việt: We live in a dynamic world, and habitats are always undergoing changes at all sorts of levels. However, natural changes usually occur at a slow pace so that impacts on individual species tend to be slight - at least in the short term When the pace of change is greatly accelerated, there may be no time for individual species to react to new circumstances, and the effects can be disastrous. Briefly, this is the reason that rapid habitat loss is...
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Dịch văn bản sau sang Tiếng Việt:

We live in a dynamic world, and habitats are always undergoing changes at all sorts of levels. However, natural changes usually occur at a slow pace so that impacts on individual species tend to be slight - at least in the short term
When the pace of change is greatly accelerated, there may be no time for individual species to react to new circumstances, and the effects can be disastrous. Briefly, this is the reason that rapid habitat loss is regarded as the chief cause of species endangerment, and there is no force more powerful in this regard than human beings. To some extent, every part of the earth has been affected by human activities, especially during this past century. This applies on virtually every scale, from the loss of microbes in soils that once supported tropical forests, to the extinction of fish and other aquatic species in polluted freshwater habitats, to changes in global climate caused by the release of greenhouse gases. From the perspective of an individual human lifetime, such changes may be hard to detect and their effects on individual species may be hard to predict. But the lesson is clear enough. For example, although many countries have had plans to grow many tropical forests, they are highly susceptible to destruction because the soils in which they grow are poor in available nutrients. Centuries may be required to bring back a forest that was cut down or burnt out in the space of a few years. Many of the world's severely threatened animals and plants live in such forests, and it is certain that huge numbers of them will disappear if present rates of forest loss continue. Habitats in the world are unchangeable and fixedly exist.

2
7 tháng 10 2018

Chúng ta sống trong một thế giới năng động, và môi trường sống luôn luôn trải qua những thay đổi ở tất cả các cấp độ. Tuy nhiên, những thay đổi tự nhiên thường xảy ra ở tốc độ chậm để tác động đến từng loài có xu hướng nhỏ - ít nhất là trong ngắn hạn
Khi tốc độ thay đổi được tăng tốc đáng kể, có thể không có thời gian để các loài cá thể phản ứng với hoàn cảnh mới, và các hiệu ứng có thể là thảm họa. Tóm lại, đây là lý do khiến mất môi trường sống nhanh chóng được coi là nguyên nhân chính gây nguy hiểm cho loài, và không có lực lượng nào mạnh hơn trong vấn đề này so với con người. Ở một mức độ nào đó, mọi phần của trái đất đã bị ảnh hưởng bởi các hoạt động của con người, đặc biệt là trong thế kỷ qua. Điều này áp dụng trên hầu hết mọi quy mô, từ việc mất vi khuẩn trong đất đã từng hỗ trợ rừng nhiệt đới, đến sự tuyệt chủng của cá và các loài thủy sinh khác trong môi trường nước ngọt bị ô nhiễm, thay đổi khí hậu toàn cầu gây ra bởi việc thải khí nhà kính. Từ quan điểm của một đời người, những thay đổi như vậy có thể khó phát hiện và ảnh hưởng của chúng đối với từng loài có thể khó dự đoán. Nhưng bài học là đủ rõ ràng. Ví dụ, mặc dù nhiều quốc gia đã có kế hoạch trồng nhiều khu rừng nhiệt đới, chúng rất dễ bị phá hủy bởi vì các loại đất mà chúng phát triển rất nghèo trong các chất dinh dưỡng sẵn có. Nhiều thế kỷ có thể được yêu cầu mang lại một khu rừng bị cắt giảm hoặc bị đốt cháy trong không gian vài năm. Nhiều loài động vật và thực vật bị đe dọa nghiêm trọng trên thế giới sống trong các khu rừng như vậy, và chắc chắn rằng một số lượng lớn chúng sẽ biến mất nếu tỷ lệ mất rừng hiện tại tiếp tục. Môi trường sống trên thế giới là không thể thay đổi và tồn tại cố định.

P/S:ggdịch is freehiha~

7 tháng 10 2018

chụy Google dịch đọc méo hiểu gì nên mới lết xác lên đây đấy -.-