单选题：The "American sleep debt" (Line 1, Para. 3) is the result of

题目分类：综合类
题目类型：单选题
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题目内容：

The "American sleep debt" (Line 1, Para. 3) is the result of_____ A．the traditiona! misconception the Americans have about sleep.
B．the new sleep policy of the Clinton Administration.
C．the rapid development of American industry.
D．the Americans' worry about the danger of sleepiness.

参考答案：

答案解析：

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分类：综合类题型：单选题

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分类：综合类题型：单选题

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分类：综合类题型：单选题

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分类：综合类题型：单选题

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分类：综合类题型：单选题