The sun shines because it ______. The moon seems to change size and shape because ______.

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问题 The sun shines because it ______.
The moon seems to change size and shape because ______.

选项 A、it gives off different amounts of light
B、part of it bums up
C、we see different parts of it

答案C

解析 我们看到月亮的形状在变化,主要是因为我们看到的是被太阳照亮的不同部分:
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