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问题 多项选择题

关于制冷机房设备布置原则，下列说法正确的是______。

A．压缩机均设于室内，其辅助设备可以设在室内、室外或敞开式建筑中

B．压缩机的压力表及其他操作仪表应面向主要操作通道

C．压缩机进、排气阀应位于或接近于主要操作通道，设置高度宜为1.2～1.5m

D．中间冷却器应尽量做到多台压缩机合用，并应设置安全阀、压力表、液面指示器、自动控制仪和超高液位报警

答案

参考答案：A,B,C,D

完形填空

CPR is cardiopulmonary resuscitation (心肺复苏). It forces air into the lungs and pumps(用泵抽) blood and oxygen to the brain in order to increase the chances that a person whose heart stops will survive. It increases the chances that he or she will suffer little or no brain damage.

The American Heart Association suggests two ways to perform CPR. One combines the use of hands to pump the victim’s chest with rescue breathing. The other method is called “Hands-Only CPR”, which is for people who are unwilling or unable to perform rescue breathing. Some people fear infection(感染). Others say they are afraid of making the patient worse.

But the American Heart Association strongly asks people in contact with a victim(受害者) to take action and tells how to take it. It says you can recognize a person needing CPR. He or she is unconscious(无意识) -- unable to communicate or react to surroundings or speech. His or her skin has lost color. The person is not breathing. If such conditions describe the situation, chances are the heart has stopped beating.

You should act by calling for help, or sending someone else. Even if you cannot do mouth-to-mouth rescue breathing, you can perform Hands-Only CPR. You can do chest compressions(压迫) that help to keep blood flowing to the brain and the heart. To perform the compressions, place one hand over the other and press firmly on the center of the victim’s chest. Push down about five centimeters. Aim for one hundred compressions each minute.

Doctor Sayre suggests that medical workers do both the breathing method and chest compressions as usual. He says some victims, including babies, need the mouth-to-mouth breathing with the compressions. Still, the doctor says it is better to do just chest compressions than to do nothing.

 
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选择题

—Where's the clock?

—Is ______ on the desk?[ ]

A. that    

B. this    

C. it

D. they
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