2. 外语
  3. The best title for this passage is______. If an object weighed one pound 8,000 miles above the earth, it would weigh ______ on

The best title for this passage is______. If an object weighed one pound 8,000 miles above the earth, it would weigh ______ on

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问题 The best title for this passage is______.
If an object weighed one pound 8,000 miles above the earth, it would weigh ______ on the surface of the earth.
选项 A、6 pounds
B、4 pounds
C、9 pounds
D、1/9 pound
答案D
解析 从第三句第二句If you treble the distance，it gets nine times weaker (three times three)可知，如果距离变为原来的三倍，那么物体的重量就减少到原来的九分之一。故D为正确答案。
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