当一个实施补充运行的飞机在无人烟地区上空飞行时，应在飞机上配备多少救生包？

下列哪几项符合限制型心肌病的临床表现（）

A.常伴有血压升高

B.心音减弱，可出现心律失常

C.颈静脉怒张

D.可有奇脉，易发生栓塞

E.X线检查示心影不增大，心内膜钙化影

患者男，45岁，上颌左侧后牙全部缺失，可摘局部义齿修复后咬腮。以下处理方法中错误的是（）

A.加大左侧后牙覆盖

B.适当升高咬合

C.适当加厚左侧颊侧基托推开颊肌

D.调磨过锐的左下后牙牙尖

E.适度调磨下颌后牙颊面

阅读理解

     If you see someone drowning, speed is very important. Once you get him out of the water, if he isn't

breathing, you have four minutes before his brain is completely destroyed.  Support his neck, tilt(使翘

起) his head back and press his chin (下巴) upwards.This stops the tongue blocking the airway in the

throat and is sometimes enough to get him breathing again. If that doesn't work, start mouth-to-mouth

breathing. Prees his nostrils (鼻孔) together with your fingers. Open your mouth and take a deep breath.  Blow into his lungs until his chest rises, then remove your mouth and watch his chest fall. Repeat

twelve times a minute. Keep doing until help arrives.

    To bring a child back to life, keep your lips around his mouth and nose and gently blow into his

mouth. Give the first four breaths as quickly as possible to fill the blood with oxygen. If, in spite of your

efforts, he starts tuming a blue-grey colour, and you can feel no pulse (脉搏) , then pressing is the last

chance of saving his life.

    With arms straight, rock forwards, pressing down on the lower half of the breastbone. Don't be too

hard or you may break a rib(肋骨). Check how effective you are seeing if his colour improves or his

pulse becomes independent to your chest pressing. If this happens, stopthe pressing. Otherwise continue

until rescue amves.

1. This passage is mainly about          .

A. how to save people out of the water

B. how to give first aid to people who are drowning

C. how to do mouth-to-mouth breathing

D. how to save a child from a nver

2. Once you get a drowning man out of the water, if he isn't breathing, you must first       .

A. get him breathing again

B. take him to the nearest hospital as soon as possible

C. find someone to help you

D. call the First Aid Centre

3. In the last paragraph, the underlined word "rescue" means       .

A. breath                    

B. help

C. doctor                    

D. pulse

4. If the drowning boy has no pulse,        .

A. pressing his chin upwards is enough to get him breathing

B. blowing air into his mouth is sure to save his life

C. pressing his nostrils together with your fingers can work

D. pressing is the last chance of saving his life

我国人口老龄化形势严峻，子女赡养负担加重，为适应人口发展新形势，党中央对计划生育政策进行重大调位完善，启动实施“单独两孩”政策。材料体现的哲理是（）

①社会意识根源于社会存在并促进其发展

②价值判断和价值选择往往会因人而异

③完善上层建筑以更好地服务于经济基础

④价值判断和价值选择具有社会历史性

A.①②

B.②③

C.③④

D.①④

精馏塔建立全回流时，初期回流量要小的目的是（）。

（A）减少公用工程消耗

（B）保护离心泵

（C）防止液击

（D）防止泵气蚀