Dr. Getsy says a nap is good as long as you sleep no more than______.A.an hourB.one and ha

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Dr. Getsy says a nap is good as long as you sleep no more than______.

A.an hour

B.one and half hours

C.two hours

D.two and half hours

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗