The second paragraph is mainly concerned with ____________. It can be inferred from the passage that a clear view of the sun’s

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问题 The second paragraph is mainly concerned with ____________.
It can be inferred from the passage that a clear view of the sun’s outer layer is usually vented by_______.

选项 A、the sun’s rays
B、an eclipse
C、lack of light
D、the great distance

答案A

解析 通过整篇文章阅读得出。故本题答案为A。
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