单项选择题

The writer implies that ______.

A．sleep is important for good mental and physical health
B．a light sleep is as restful as a deep sleep
C．memory is improved during sleep
D．sleep is relatively unimportant for human beings

<上一题目录下一题>

热门试题

单项选择题

If a person is not allowed to follow his before-sleep routine, he will probably ______.

A．not sleep well
B．never fall asleep
C．lose his memory
D．begin to daydream

单项选择题

The computer center can ______.

A．give the firemen important help in almost every way
B．have limited ways of helping fire-fighters
C．hardly give any useful information for the fire brigade
D．put out every fire automatically