🎓 Lớp 11 📖 Global Success 📌 Unit 9 🔖 Reading
Câu hỏi số 11 (Mã ID: #2208092) 👉 Hãy chọn đáp án bạn cho là đúng

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 professional 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 blamed 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.

According to the passage, the changes possibly caused by the cellphones are mainly concerned with __________.

💡 Lời giải & Giải thích chi tiết:

Đáp án đúng: A

Giải thích:

Dựa vào câu: On the other hand, medical studies have shown changes in the brain cells of some people who use mobile phones. (Mặt khác, các nghiên cứu y khoa đã chỉ ra những thay đổi trong tế bào não của một số người sử dụng điện thoại di động.)

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