问题 单项选择题 A型题

下列描述继发孔房间隔缺损的超声表现哪项是错误的()。

A.右心房、右心室均增大

B.房间隔中部连续中断

C.左心房、左心室均增大

D.室间隔与左心室后壁同向运动

E.肺动脉增宽

答案

参考答案:C

解析:房间隔缺损是先天性心脏病中最常见的,分为继发孔、原发孔房间隔缺损,前者表现为房间隔中部及中上部连续中断,而后者表现为房间膈下部连续中断,右心容量负荷过重,右心房、右心室增大,室间隔与左心室后壁同向运动,肺动脉增宽等。

阅读理解

阅读理解。

      Around the world more and more people are taking part in dangerous sports and activities. Of course,

there have always been people who have looked for adventure-those who have climbed the highest mountains,

explored unknown parts of the world or sailed in small boats across the greatest oceans. Now, however,

there are people who seek an immediate excitement from a risky activity which may only last a few minutes

or even seconds.

      I would consider bungee jumping to be a good example of such an activity. You jump from a high place

(perhaps a bridge or a hot-air balloon)200 meters above the ground with an elastic (有弹性的) rope tied to

your ankles. You fall at up to l50 kilometers an hour until the rope stops you from hitting the ground. It is

estimated that two million people around the world have now tried bungee jumping. Other activities which

most people would say are as risky as bungee jumping include jumping from tall buildings and diving into

the sea from the top of high cliffs.

      Why do people take part in such activities as these?Some psychologists suggest that it is because life in

modern societies has become safe and boring. Not very long ago, people's lives were constantly under threat.

They had to go out and hunt for food, diseases could not easily be cured,and life was a continuous battle for

survival.

      Nowadays, according to many people, life offers little excitement. They live and work in comparatively

safe environment; they buy food in shops; and there are doctors and hospitals to look after them if they

become ill. The answer for some of these people is to seek danger in activities such as bungee jumping.

1. More and more people today ______. [ ]

A. are close to death in sports

B. are climbing the highest mountains

C. are trying activities such as bungee jumping

D. are looking for adventures such as exploring unknown places

2. In bungee jumping, you ______. [ ]

A. jump as high as you can

B. slide down a rope to the ground

C. fall towards the ground without a rope

D. attach yourself to a rope and fall to the ground

3. People probably take part in dangerous sports nowadays because ______. [ ]

A. they lack excitement

B. they have a lot of free time

C. they no longer need to hunt for food

D. they can go to hospital if they are injured

4. Which of the following is the best title for this text? [ ]

A. The Need for Excitement

B. The Boredom of Modern Life

C. Dangerous Sports: What and Why

D. Is Bungee Jumping Really Dangerous

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