单项选择题

A. The lack of air pressure. C. Exposure to radiation.
B. The extremely hot or cold temperature. D. An inadequately ventilated space suit.
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单项选择题
A. In the third room on the right. C. In a room at this end. B. In the Common Room. D. In Room 501.
A. In the third room on the right. C. In a room at this end.
B. In the Common Room. D. In Room 501.
填空题
I
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