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  3. How much would four pounds of tea weigh if it was taken 4,000 miles out from the surface of the earth? The main idea of this pa

How much would four pounds of tea weigh if it was taken 4,000 miles out from the surface of the earth? The main idea of this pa

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问题 How much would four pounds of tea weigh if it was taken 4,000 miles out from the surface of the earth?
The main idea of this passage is
选项 A、different weight systems in different places.
B、freedom from traditional ideas.
C、traveling from the earth to the moon.
D、the effect of gravitation on weight.
答案D
解析
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