单项选择题

The "American sleep debt'(Line 1,Par

A．3)is the result of ______.A. the traditional misconception have about sleepB. the new sleep policy of the Clinton AdministrationC. the rapid development of American industryD. the Americans' worry about the danger of sleepness

<上一题目录下一题>

热门试题

单项选择题

The purpose of this article is to ______.

A．warn us of the wickedness of napping
B．explain the danger of sleepiness
C．discuss the side effects of napping
D．convince the reader of the necessity of napping

单项选择题

The research done by the Dement commission shows that Americans ______.

A．don't like to take naps
B．are terribly worried about their national debt
C．sleep less than is good for them
D．have caused many industrial and traffic accidents