问题 单项选择题

患者男性,52岁,高血压病史20年,近来活动后气喘。心电图如图5-11所示,应诊断为()

A.前间壁心肌梗死

B.左束支阻滞

C.左心室肥厚,继发性ST-T改变

D.左前分支阻滞

E.双心室肥厚

答案

参考答案:C

解析:

窦性心律,左心室肥厚,继发性ST-T改变解析:心电图显示窦性心律,PR间期0.20秒。电轴左偏,QRS电压显著增高。RV5及RV6>2.5mV,SV1+RV5>4.0mV,RaVL>1.2mV,R1+S3>2.5mV,Comell指数(RaVL+Sv3)>2.8mV。另外,在R波为主的导联出现ST段压低及T波倒置,为左心室肥厚导致的继发性ST-T改变。严重左心室肥厚时,V1~V2导联可呈QS波,酷似前间壁心肌梗死。

阅读理解

阅读理解。

     Water is the "life" of our earth. It is in every living thing. It is in the air. It

runs through mountains and valleys. It forms lakes and oceans. Water is

everywhere.

     Nature has a great water system. Rainwater finds its way to streams and

rivers. Rivers lead to the ocean. At mouths of rivers, fresh water joins the salt

water of the ocean.

     Thick water steam in the air becomes clouds and clouds bring us rain. Plans

and animal's life depends on water. Where there is water, there is life. We have

to clean our streams and rivers and do something against pollution because

pollution does harm to the life.

1.We say water is the "life" of our earth because _______.

A. water is in the air

B. water can run everywhere

C. there are living things in the water

D. where there is water, there is life

2. Which of the following is exactly the same as what the article says?           

3. According to the article, which of the following is correct?               

A. Water is in every living thing.

B. Water is everything.

C. Water forms everything.

D. Water runs through everything.

4. According to the article, fresh water joins the salt water of the ocean              .

A. in the valleys

B. in the mountains

C. at mouths of rivers

D. at mouths of oceans

5. What does this article say we have to do against pollution?                 

A. Clean the steam.

B. Stop air pollution.

C. Prevent the fresh water from joining the salt water.

D. Clean our streams and rivers.

判断题