Thứ năm, 14/11/2024
IMG-LOGO

Câu hỏi:

21/07/2024 238

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 38 to 42

Millions of people are using cellphones today. In many places, it is actually considered unusual not to use one. In many countries, cellphones are very popular with young people. They find that the phones are more than a means of communication - having a mobile phone shows that they are cool and connected.

The explosion in mobile phone use around the world has made some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health. On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. Signs of change in the tissues of the brain and head can be detected with modern scanning equipment. In one case, a traveling salesman had to retire at young age because of serious memory loss. He couldn't remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer's doctor didn't agree.

What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.

As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone too often.

The changes possibly caused by the cellphones are mainly concerned with ______.

A. the mobility of the mind and the body

B. the smallest units of the brain 

Đáp án chính xác

C. the arteries of the brain

D. the resident memory

 Xem lời giải

Trả lời:

verified Giải bởi Vietjack

Đáp án B

Giải thích: “On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones”. Brain cells = the smallest units of the brain: tế bào não

Câu trả lời này có hữu ích không?

0

Gói VIP thi online tại VietJack (chỉ 400k/1 năm học), luyện tập gần 1 triệu câu hỏi có đáp án chi tiết

ĐĂNG KÝ VIP

CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1:

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. 

Many successful (A) film directions (B) are former (C) actors who desire to expand (D) their experience in the film industry. 

Xem đáp án » 11/09/2022 44,041

Câu 2:

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. 

We admire Lucy for (A) her intelligence (B), cheerful disposition (C) and she is honest. (D) 

Xem đáp án » 11/09/2022 25,560

Câu 3:

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

The old houses were ______ down to make way for a block of flats. 

Xem đáp án » 11/09/2022 14,010

Câu 4:

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

The building has a smoke detector ______ any fires can be detected immediately. 

Xem đáp án » 11/09/2022 13,918

Câu 5:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. 

David drove so fast; it was very dangerous. 

Xem đáp án » 11/09/2022 13,465

Câu 6:

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

My car is getting unreliable; I think I'll trade it ______ for a new one. 

Xem đáp án » 11/09/2022 13,339

Câu 7:

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. 

Educated in the UK (A), his qualifications are (B) widely recognized (C) in the world of professionals. (D) 

Xem đáp án » 11/09/2022 7,751

Câu 8:

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

_______ that she burst into tears. 

Xem đáp án » 11/09/2022 7,632

Câu 9:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. 

The critics undervalued his new book. 

Xem đáp án » 11/09/2022 7,338

Câu 10:

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

Prizes are awarded ______ the number of points scored. 

Xem đáp án » 11/09/2022 6,910

Câu 11:

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

While southern California is densely populated, ______ live in the northern part of the state. 

Xem đáp án » 11/09/2022 6,673

Câu 12:

 

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. 

The captain to his men: “Abandon the ship immediately!” 

Xem đáp án » 11/09/2022 6,649

Câu 13:

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

Ensure there is at least a 3cm space ______ allow adequate ventilation. 

Xem đáp án » 11/09/2022 6,554

Câu 14:

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

Anne persisted ______ her search for the truth about what had happened. 

Xem đáp án » 11/09/2022 6,223

Câu 15:

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

Why don’t you ask the man where ______ to stay? 

Xem đáp án » 11/09/2022 5,840

Câu hỏi mới nhất

Xem thêm »
Xem thêm »