Câu hỏi:
20/04/2022 145
Most of the helium in the universe was formed___________
Most of the helium in the universe was formed___________
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Câu hỏi trong đề:
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Trả lời:
Giải bởi Vietjack
Hầu hết helium trong vũ trụ được hình thành.
A. trong một thời gian rất ngắn
B. trong phút đầu tiên của sự tồn tại của vũ trụ
C. trong không gian liên sao
D. trước phần lớn hydro
Đáp án: A
Giải thích: “However, when the universe was less than one minute old, no helium could have existed...”, “By the time the universe was a few minutes old, helium production had effectively ceased.”: Tuy nhiên, khi vũ trụ chưa tồn tại được đầy một phút, không có helium nào có thể tồn tại...Vào thời điểm vũ trụ tồn tại đã được vài phút, việc sản xuất helium trên thực tế đã chấm dứt. việc sản xuất Heli chỉ diễn ra trong vài phút.
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