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20 tháng 1 2022

 Sự phức tạp của não bộ và cơ chế hoạt động của chúng là một trong những điều khiến các nhà khoa học mới chỉ đưa ra được nhận định về các tác nhân (yếu tố nguy cơ) gây bệnh Alzheimer.

20 tháng 1 2022

Tại sao khó chữa khỏi bệnh Alzheimer?

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's...
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Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's occurs. Based on this relationship, scientists from the University of Lund in Sweden and the University of California at San Diego designed an experiment to test whether doses of nerve growth factor could reverse the effects of memory loss caused by Alzheimer's. Using a group of rats with impaired memory, the scientists gave half of the rats doses of nerve growth factor while giving the other half a blood protein as a placebo, thus creating a control group. At the end of the four-week test, the rats given the nerve growth factor performed equally to rats with normal memory abilities. While the experiments do not show that nerve growth factor can stop the general process of deterioration caused by Alzheimer's, they do show potential as a means to slowing the process significantly.

The relationship between nerve growth factor and a protein is similar to the relationship between Alzheimer's and ______.

A. forgetfulness    

B. a disease 

C. a cure     

D. a cancer

1
9 tháng 11 2017

Đáp án C
Thông tin ở đoạn 2: “Today there are more than 700 million English users in the world, and over half of these are nonnative speakers…”

6. We could just see him in the crowd.  (make) We …………………………………………………..………………in the crowd.7. The area is so polluted that it is hard to live there.  (pollution) Such ……………………………………………….…………………that it is hard to live there.8. Why were you so impatient in such a situation?  (supposed) You are …………………………………….……………………such a situation.9. He is likely to arrive late again.  (probably) He ……………………………………………………………………………again.10. I don’t mind if you leave now.  (objection) I have...
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6. We could just see him in the crowd.  (make)
 We …………………………………………………..………………in the crowd.
7. The area is so polluted that it is hard to live there.  (pollution)
 Such ……………………………………………….…………………that it is hard to live there.
8. Why were you so impatient in such a situation?  (supposed)
 You are …………………………………….……………………such a situation.
9. He is likely to arrive late again.  (probably)
 He ……………………………………………………………………………again.
10. I don’t mind if you leave now.  (objection)
 I have ………………………………………………….…………………now

 

1
14 tháng 8 2021

6. We could just see him in the crowd.  (make)
 We ………………………could just make him out…………………………..………………in the crowd.

7. The area is so polluted that it is hard to live there.  (pollution)
 Such …………………is the pollution of the area…………………………….…………………that it is hard to live there.
8. Why were you so impatient in such a situation?  (supposed)
 You are ………………supposed to have been patient in…………………….……………………such a situation.
9. He is likely to arrive late again.  (probably)
 He ………………will probably arrive late……………………………………………………………again.
10. I don’t mind if you leave now.  (objection)
 I have ………………………………no objection to your leaving……………….…………………now

 

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's occurs. Based on this relationship, scientists from the University of Lund in Sweden and the University of California at San Diego designed an experiment to test whether doses of nerve growth factor could reverse the effects of memory loss caused by Alzheimer's. Using a group of rats with impaired memory, the scientists gave half of the rats doses of nerve growth factor while giving the other half a blood protein as a placebo, thus creating a control group. At the end of the four-week test, the rats given the nerve growth factor performed equally to rats with normal memory abilities. While the experiments do not show that nerve growth factor can stop the general process of deterioration caused by Alzheimer's, they do show potential as a means to slowing the process significantly.

Which of the following is closest in meaning to the word "deterioration"?

A. depression       

B. deduction         

C. decline    

D. disconnection

1
10 tháng 4 2018

Đáp án D                         
proliferated” = expanded: làm cho mở rộng, tăng nhanh

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's occurs. Based on this relationship, scientists from the University of Lund in Sweden and the University of California at San Diego designed an experiment to test whether doses of nerve growth factor could reverse the effects of memory loss caused by Alzheimer's. Using a group of rats with impaired memory, the scientists gave half of the rats doses of nerve growth factor while giving the other half a blood protein as a placebo, thus creating a control group. At the end of the four-week test, the rats given the nerve growth factor performed equally to rats with normal memory abilities. While the experiments do not show that nerve growth factor can stop the general process of deterioration caused by Alzheimer's, they do show potential as a means to slowing the process significantly.

According to the passage, where is nerve growth factor produced in the body?

A. In nerve cells in the spinal column

B. In red blood cells in the circulatory system

C. In nerve cells in the brain    

D. In the pituitary gland

1
29 tháng 4 2017

Đáp án D
Thông tin ở đoạn 1: “Until the 1600s, English was, for the most part, spoken only in England…”

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's occurs. Based on this relationship, scientists from the University of Lund in Sweden and the University of California at San Diego designed an experiment to test whether doses of nerve growth factor could reverse the effects of memory loss caused by Alzheimer's. Using a group of rats with impaired memory, the scientists gave half of the rats doses of nerve growth factor while giving the other half a blood protein as a placebo, thus creating a control group. At the end of the four-week test, the rats given the nerve growth factor performed equally to rats with normal memory abilities. While the experiments do not show that nerve growth factor can stop the general process of deterioration caused by Alzheimer's, they do show potential as a means to slowing the process significantly.

The word “impairs” in line 1 is most similar to which of the following?

A. affects    

B. destroys 

C. enhances          

D. diminishes

1
5 tháng 11 2019

Đáp án A
emerged” = appeared: xuất hiện

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's occurs. Based on this relationship, scientists from the University of Lund in Sweden and the University of California at San Diego designed an experiment to test whether doses of nerve growth factor could reverse the effects of memory loss caused by Alzheimer's. Using a group of rats with impaired memory, the scientists gave half of the rats doses of nerve growth factor while giving the other half a blood protein as a placebo, thus creating a control group. At the end of the four-week test, the rats given the nerve growth factor performed equally to rats with normal memory abilities. While the experiments do not show that nerve growth factor can stop the general process of deterioration caused by Alzheimer's, they do show potential as a means to slowing the process significantly.

With what topic is this passage mainly concerned?

A. Impaired memory of patients        

B. Cures for Alzheimer's disease

C. The use of rats as experimental subjects 

D. Nerve growth factor as a cure for Alzheimer's

1
17 tháng 2 2018

Đáp án C

Dựa vào câu chủ đề từng đoạn: 1 “Over the past 600 years, English has grown from a language of few speakers to become the dominant language of international communication.” Và (2): “Currently, about 80 percent of the information stored on computer systems worldwide is English.”
=> ý chính nói đế sự phát triển tiếng Anh như ngôn ngữ trên toàn cầu

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's occurs. Based on this relationship, scientists from the University of Lund in Sweden and the University of California at San Diego designed an experiment to test whether doses of nerve growth factor could reverse the effects of memory loss caused by Alzheimer's. Using a group of rats with impaired memory, the scientists gave half of the rats doses of nerve growth factor while giving the other half a blood protein as a placebo, thus creating a control group. At the end of the four-week test, the rats given the nerve growth factor performed equally to rats with normal memory abilities. While the experiments do not show that nerve growth factor can stop the general process of deterioration caused by Alzheimer's, they do show potential as a means to slowing the process significantly.

Which of the following could best replace the word "significantly"?

A. considerably    

B. knowingly        

C. suggestively      

D. tirelessly

1
3 tháng 4 2017

Đáp án B
- “stored” = saved: lưu trữ

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's occurs. Based on this relationship, scientists from the University of Lund in Sweden and the University of California at San Diego designed an experiment to test whether doses of nerve growth factor could reverse the effects of memory loss caused by Alzheimer's. Using a group of rats with impaired memory, the scientists gave half of the rats doses of nerve growth factor while giving the other half a blood protein as a placebo, thus creating a control group. At the end of the four-week test, the rats given the nerve growth factor performed equally to rats with normal memory abilities. While the experiments do not show that nerve growth factor can stop the general process of deterioration caused by Alzheimer's, they do show potential as a means to slowing the process significantly.

Which of the following can be inferred from the passage?

A. Alzheimer's disease is deadly.

B. Though unsuccessful, the experiments did show some benefits derived from nerve growth factor.

C. The experiments did not show any significant benefits from nerve growth factor.

D. More work needs to be done to understand the effects of nerve growth factor.

1
20 tháng 5 2019

Đáp án D
Thông tin ở đoạn 1: “English began to spread around the globe as a result of exploration, trade (including slave trade) (A), colonization (C), and missionary work (B).”

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Alzheimer's disease impairs a person's ability to recall memories, both distant and as recent as a few hours before. Although there is not yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's occurs. Based on this relationship, scientists from the University of Lund in Sweden and the University of California at San Diego designed an experiment to test whether doses of nerve growth factor could reverse the effects of memory loss caused by Alzheimer's. Using a group of rats with impaired memory, the scientists gave half of the rats doses of nerve growth factor while giving the other half a blood protein as a placebo, thus creating a control group. At the end of the four-week test, the rats given the nerve growth factor performed equally to rats with normal memory abilities. While the experiments do not show that nerve growth factor can stop the general process of deterioration caused by Alzheimer's, they do show potential as a means to slowing the process significantly.

The passage most closely resembles which of the following patterns of organization?

A. chronological order             

B. statement and illustration

C. cause – effect             

D. alphabetical order

1
8 tháng 12 2019

Đáp án A
enclaves” = communities: cộng đồng sử dụng tiếng anh

It is not easy for adult students of English to improve their accents. Unlike children, who are flexible, adults often find it hard to change the way they speak. This is why even the top or smartest adult students have difficulty with pronunciation. There are several things that an international student can do to improve his or her pronunciation One method is to sign up for a pronunciation class. Studying pronunciation can help students to understand the rules of English, but in order to...
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It is not easy for adult students of English to improve their accents. Unlike children, who are flexible, adults often find it hard to change the way they speak. This is why even the top or smartest adult students have difficulty with pronunciation. There are several things that an international student can do to improve his or her pronunciation

 One method is to sign up for a pronunciation class. Studying pronunciation can help students to understand the rules of English, but in order to practice speaking, students often need to be exposed to English outside the classroom as well. This is why many students say that studying in an English_ speaking country greatly affects their English. Living with native speakers can help students to pick up new vocabulary as well as improve their accents. This can help to prevent misunderstandings that can occur when people from different country live together.

Living with someone from another culture can be difficult. International students are usually excited when they first show up at their new homes, but after a few months they may start to think about their home countries and get homesick. Students who are homesick get depressed quickly. They might cry a lot or want to be alone. This makes it difficult for them to make friends and learn English

1. The best title of the passage can be “How to overcome homesickness”.

A. True B. False

2. From the reading passage, attending a pronunciation class can be very helpful to adult learners who have problem with their pronunciation.

A. True B. False

3. From the reading passage, living with someone from another country is quite easy.

A. True B. False

4. Students of English can’t pick up new vocabulary by living with native speakers.

A. True B. False

5. In the context of the passage, what does “to be exposed to English” mean?

A. Living in an English-speaking environment.

B. avoiding speaking English outside the classroom.

C. Listening to native speakers.

D. imitating native speakers.

6. From the reading passage, which of the following is true? 

A. To avoid misunderstanding about cultures, students should live with native speakers.

B. Many students feel depressed because they cannot improve their pronunciation.

C. When international students reach their new homes, most of them may forget about the problems because they are very excited.

D. Studying in an English-speaking country doesn’t help international students improve their English.

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