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问题 选择题

2011年9月21日是第30个国际和平日。联合国设立这一纪念日的目的是“在各国和人民中纪念并加强和平理想”。国际和平日的设立表明了当今时代各国人民的共同愿望是[     ]

A．想尽办法加快本国经济发展

B．谋求和平与发展，促进合作与进步 

C．促进经济全球化和世界多极化的发展

D．极力反对霸权主义和强权政治 

答案

答案：B

单项选择题

After a day’s hard work, we need some sleep. During the sleep, the fatigue (疲劳) of the body disappears and recuperation (恢复) begins. The tired mind gathers new energy, and the memory improves: Some adults require little sleep; others need eight to ten hours in every twenty-four hours. Infants (婴儿) sleep sixteen to eighteen hours dally, the amount gradually diminishing as they grow older. Young students may need twelve hours; university students may need ten. A worker with a physically demanding job may also need ten, whereas an executive working under great pressure may manage on six to eight. Many famous people have little sleep. Napoleon Bonaparte, Thomas Edison and Charles Darwin apparently averaged only four to six hours a night.

Whatever your individual need, you can be sure that by the age of thirty you will have slept for a total of more than twelve years. By that age you will also have developed a sleep routine: a favorite hour, a-favorite bed, a favorite position, and a rule you need to follow in order to rest comfortably.

Investigators have tried to find out how long a person can go without sleep. Several people have reached more than 115 hours—nearly five days. Whatever the limit, it is absolute. Animals that kept awake for from five to eight days have died of exhaustion. The limit for human beings is probably about a week.

If a person is not allowed to follow his own sleep routine, he will probably（）

A. never fall asleep

B. not sleep well

C. lose his memory

D. begin to daydream
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判断题

冷制芯吹送三乙胺的量应控制在0.08-0.12%。
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