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问题 单项选择题 A3/A4型题

女性，58岁，10天前曾划破右下肢皮肤。3天来高热，伴皮肤淤点。查体：血压80/50mmHg（10.7/6.7kPa）。诊断为败血症、感染中毒性休克，经积极治疗后仍高热不退，且出现气急，未吸氧时PaO245mmHg。X线示肺纹理增多、模糊。

为排除或确诊左心衰竭，最有意义的检测为（）。

A.平均肺动脉压

B.心电图

C.肺动脉楔嵌压

D.胸部CT

E.右室舒张末期压

答案

参考答案：C

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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填空题

如果人民币一年定期储蓄的年利率是x，一年到期后，银行将本金和利息自动按一年定期储蓄转存，到期支取时，银行将扣除利息的20%作为利息税（第一年转存不扣利息税），请你写出存1000元两年后支取时的本息和y（元）与年利率x的函数表达式（    ）。
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