__________ 查看材料A.That"s why it"s possible for
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A.That"s why it"s possible for two kids with the same height， but different weights， to both be the right weight.
B.If you eat more calories than your body needs to use， you will gain too much weight.
C.Poor eating and exercise habits also run in families and this may be the reason the members of a family are overweight.
D.However， many overweight people have difficulty reaching their healthy body weight.
E.On the other hand， if you eat less and exercise more， you may lose weight.
F.If both your parents are tall， there is a good chance you"ll be tall.
请帮忙给出正确答案和分析，谢谢！
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正确答案：正确A
该段讲的是骨架(skeleton)的大小对体重的影响。空格前一句讲的是“大骨架的重量会较重”，空格处应填入对此解释的现象：这就是为什么两个孩子身高相同，体重相对于正常重量来讲却是不相同的。因此A最合适。