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Câu hỏi:
Why are space travelers exposed to more radiation?
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A.
Their spacesuits are too thin to protect them.
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B.
They lack protection provided by Earth’s atmosphere.
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C.
They stay in the space for such a long time.
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D.
They float around inside the craft and have space sickness.
Lời giải tham khảo:
Đáp án đúng: B
Hãy trả lời câu hỏi trước khi xem đáp án và lời giải -
A.
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