问题 单项选择题 B型题

二尖瓣狭窄()

A.局限在心尖部

B.向剑突处传导

C.向颈部传导

D.向心尖部传导

E.向左腋下传导

答案

参考答案:A

解析:二尖瓣狭窄时在心尖部可闻及局限性、舒张中、晚期隆隆样杂音,呈递增性,以左侧卧位、呼吸末期及活动后的杂音更为明显。

阅读理解

阅读理解。

     Because earthquakes happen without warning, it's important to take steps now to prepare. Because you

don't know where you will be when an earthquake happens, prepare some supplies for your home, workplace,

and car.

    1. Water.

    A person needs at least 1/2 gallon of water daily just for drinking. Store at least 1 gallon of water per person

per day and be prepared for a 72-hour period. It is suggested that you buy bottled water. Keep bottled water

in its original container and do not open it until you need to use it. Also, do check the"use by" date.

    2. Food.

It's always a practical idea to keep a supply of non-perishable(不易腐烂的) food on hand. Have an

enough supply of canned food, powdered milk, dried fruits, non-salted nuts and canned juices for at least 72

hours.

    3. Flashlights (手电筒) and spare batteries.

Keep a flashlight beside your bed, at your place of work, and in your car. Do not use matches or candles after

an earthquake until you are sure that no gas leaks. Prepare a battery-powered radio and spare batteries. Most

telephones will be out of order, so radios will be your best source of information.

    4. Clothes. 

    If you live in a cold place, you must think about warmth. You might not have heat after an earthquake. Think

about your clothing and bedding supplies.

1. Why should people prepare themselves for an earthquake?

A. Because earthquakes can be known before they happen.

B. Because earthquakes take place without warning.

C. Because earthquakes usually take place in the neighborhood.

D. Because it's people's daily work to prepare the earthquakes.

2. About the prepared water, which description is RIGHT?

A. A person should prepare 0.5 gallon of water for one day.

B. You'd better use your own containers to keep water.

C. You'd better open the bottled water when you buy it.

D. You shouldn't open the bottled water until you need it.

3. You should prepare all of the following except ______.

A. powdered milk

B. fresh vegetables

C. dried fruits

D. canned juices

4. According to the article we know that ______.

A. we need to prepare some supplies only at home

B. a telephone is the most important prepared thing

C. flashlights but not matches are first used after earthquakes

D. clothes are used to protect your head

5. If you live in a cold place, you should prepare _______.

A. some warm clothes and bedding supplies

B. some hot water

C. some batteries

D. some flashlights

单项选择题