Why does the author mention “cosmic rays”?
A. To explain how the universe began.
B. As an example of an unsolved astronomical puzzle.
C. To explain the abundance of hydrogen in the universe.
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Đáp án D
Dịch câu hỏi: Tại sao tác giả lại nhắc đến “tia vũ trụ”?
A. Để giải thích cách vũ trụ khai sinh
B. Như một ví dụ về một câu hỏi thiên văn chưa được trả lời.
C. Để giải thích về sự dồi dào của Hydro trong Vũ trụ.
D. Như một phần trong danh sách những thứ có chứa Heli.
Câu hỏi lấy thông tin. Hướng dẫn làm bài có ở câu 44.
Trích thông tin bài: “Helium has been found in old stars, in relatively young ones, in interstellar gas, and in the distant objects known as quasars. Helium nuclei have also been found to be constituents of cosmic rays that fall on the earth...”
Tạm dịch: Heli được tìm thấy ở các ngôi sao già, ở những ngôi sao khá trẻ, ở khí liên sao, và trong cả những vật thể xa xôi được biết đến với cái tên là vật thể giống sao. Hạt nhân Heli cũng được nhận thấy là thành tố cấu thành của tia vụ trụ chạm tới trái đất...
Như vậy, tia vũ trụ được nhắc đến như một trong những nơi có thể tìm thấy Heli.
Vậy, đáp án D là phù hợp.Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
I don’t know much about computer, so I asked the assistant for____________advice.
You should know that everyone in this office____________busy planning the dance for a week.
Everyone thought she would accept the offer. ____________, she turned it down immediately.
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.
Keith had so interesting and creative plans that everyone wanted to work on his committee.
This is a rare opportunity. You should take advantage of it to get a better job.
“Would you like to come out to dinner with me tonight, Jenny?” Paul said.
It was hard to____________the temptation to watch the late-night show even though I was so tired then.
Even though she had been studying hard, she had only a____________chance of passing the exam.
The company managed to beat the ____________on delivering its new system.
Most headaches____________with aspirin unless they are too severe.
I would have cooked something special if I____________you were coming.
Women have proved repeatedly that they are equal and often superior____________men in almost every field.
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
Read the following passage and mark the letter A, B, C or Don your answer sheet to indicate the correct word for each of the blanks from 33 to 37.
Everyone wants to reduce pollution. But the pollution (33) ____________is as complicated as it is serious. It is complicated because much pollution is caused by things that benefit people. (34) ____________, exhaust from automobiles causes a large percentage of air pollution. But the automobile provides transportation for millions of people. Factories discharge much of the material that pollutes the air and water but factories give (35) ____________to a large number of people.
Thus, to end or greatly reduce pollution immediately, people would have to (36) ____________using many things that benefit them. Most people do not want to do that, of course. But pollution can be gradually reduced in several ways. Scientists and engineers can work to find ways to lessen the amount of pollution that such things as automobiles and factories cause. Governments can pass and enforce laws (37) ____________require businesses and traffic to stop, or to cut down on certain polluting activities.
