Most of the helium in the universe was formed____________.
A. in a very short time
B. in interstellar space
C. before most of the hydrogen
Giải bởi Vietjack
Đáp án A
Dịch đề bài: Hầu hết Heli trong vũ trụ được tạo ra____________
A. trong một thời gian rất ngắn
B. trong khoảng không liên sao
C. trước khi phần lớn Hydro được sinh ra
D. trong phút tồn tại đầu tiên của Vũ trụ.
Câu hỏi lấy thông tin. Hướng dẫn làm bài có ở câu 44.
Trích thông tin bài: “But the nuclear reactions that led to the formations of helium went on for only relatively short time. By the time the universe was a few minutes old, helium production had effectively ceased.”
Tạm dịch: Nhưng phản ứng hạt nhân tạo ra Heli chỉ tiếp diễn trong một quãng thời gian khá ngắn. Cho đến lúc Vũ trụ tồn tại được một vài phút, quá trình sản xuất Heli đã hoàn toàn dừng lại.
Như vậy, các phản ứng sinh ra Heli chỉ kéo dài vài phút, khá ngắn.
Vậy nên, đáp án A 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.
I would have cooked something special if I____________you were coming.
There is still widespread____________against older people in the job market.
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.
Everyone thought she would accept the offer. ____________, she turned it down immediately.
Even though she had been studying hard, she had only a____________chance of passing the exam.
This is a rare opportunity. You should take advantage of it to get a better job.
The arrested man is suspected of____________government funds for himself.
Most headaches____________with aspirin unless they are too severe.
Women have proved repeatedly that they are equal and often superior____________men in almost every field.
A paragraph is a portion of a text consists of one or more sentences related to the same idea.
Amy and Jacob are talking about the two-day excursion at the end of the school year. Amy: “You look so sad. ____________”
Jacob: “I couldn’t get my parents’ permission to stay the night away from home.”
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.
Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the rest in the position of the main stress in each of the following questions.
