问题 单项选择题 B型题

P波提早出现,形态与窦性P波不同的是()

A.心房颤动

B.心室颤动

C.房性期前收缩

D.室性期前收缩

E.室性心动过速

答案

参考答案:C

解析:心室颤动心电图特征为:QRS波群与T波消失,呈完全无规则的波浪状曲线,形态、频率、振幅高低各异;房性期前收缩心电图特征为:P波提早出现,形态与窦性P波不同,P-R间期~0.12秒,不完全代偿;心房颤动心电图特征为:窦性P波消失,代之以大小形态及规律不一的f波,频率350~600次/分。

完形填空

任务型阅读(共5小题,每小题2分,满分10分)

Every 30 seconds there is an earthquake. But don’t worry because most are so weak that they cannot be felt. Only a few big ones hurt people.

Many earthquakes happened in China, such as the big one is Sichuan last year. Thousands of people died in it.①So it’s important to know what to do when one hits. Here are some tips on how to stay safely in an earthquake.

1. If you are indoors during an earthquake, hide under a desk. Stay away from windows and anything that could fall on you.

2. If you are outdoors, move to a clear place. Try to be away from trees, signs, buildings and streetlights. These could fall on you.

3. If you are in a shop and far from the door, don’t try to run to outside and rush for exits(出口). Everyone will be doing that and you’ll find it hard to go out. Don’t get into a lift during an earthquake. Just hide under some strong covers near you.

4. When an earthquake has ended, be careful because after-shocks may still happen.②These are just as ______ as the earth-quake itself. So stay under the desk until you make sure it’s _____ to get up.

5. If you are at home and you smell gas, open the windows and get out of the building as quickly as you can. A gas line in your house may be broken. This could be very dangerous.

1.写出或从文中找出最能表达该短文主题的句子:

___________________________________________________________________________

2.将①句翻译成中文:________________________________________________________

3.What do you remember to do when you are in a shop and far from the door during the earthquake?

___________________________________________________________________________

4.在②句相应的空白处填入适当的词使句意完整,上下文通顺:

_________,___________.

5.找出与Most earthquakes are too weak to be felt.意思相近的句子。

___________________________________________________________________________

填空题