______(48)A.That’s why it’s possible for two kids
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______(48)
A.That’s why it’s possible for two kids with the same height but different weight,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, "you eat less and exercise more, you, may lose weight.
F.If both your parents are tall,there is a good chance you＇II be tall.
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答案：C
前一句讲，身体超重有可能在家族中代代相传，但又不一定是基因遗传所致，接下来的句子就应说明其原因，即不良的饮食与运动习惯也代代相传，而这可能正是家族成员普遍超重的原因。