单选题
According to the first paragraph, the atmosphere is essential to man in that ______.
A、
it protects him against the harmful rays from space
B、
it provides sufficient light for plant growth
C、
it supplies the heat necessary for human survival
D、
it screens off the falling meteors
【正确答案】
A
【答案解析】
[解析] 从第一段中的“Space is a dangerous place．．．The atmosphere again acts as our protective blanket on earth”可知A项符合题意。
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