2. 外语
  3. The best title for this passage is______. We can feel things are heavy because ______.

The best title for this passage is______. We can feel things are heavy because ______.

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问题 The best title for this passage is______.
We can feel things are heavy because ______.
选项 A、weight is a fixed quality in an object
B、they are far away from the center of the earth
C、of the earth’s strong attraction for them
D、they are not taken away from the surface of the earth
答案C
解析 我们之所以能感觉到重量是因为地球引力的原因，所以答案为C。
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