超声诊断二尖瓣脱垂的标准是（） A.左室长轴观和心尖四腔观见二_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

超声诊断二尖瓣脱垂的标准是（）

A.左室长轴观和心尖四腔观见二尖瓣瓣体凸向左房，跨越二尖瓣环>2mm

B.二尖瓣有皱褶

C.CDFI示二尖瓣重度反流

D.二尖瓣呈连枷样

E.无标准

答案

参考答案：A

阅读理解

阅读理解。

	Welcome to the 2012 London Olympic Games!
Archery	Archery has a 10,000 year history, when bows and arrows were first used for hunting and war. Archery first appeared at the Paris Olympics of 1990. It was removed after 1908 and only returned to the Olympics at Munich in 1972. Did you know? In the 14th century, archery was so important that as English law required every man, aged seven to 60, to practise it.
Badminton	This sport was invented by British soldiers in India who called it Poono, the same name as the town in which they lived. It was first played at the Olympics in 1992 at Barcelona. Although the rules of the modern sport were developed in England, Asian countries are now the best. Did you know? The best balls are said to be made fromthe feathers of the left wing of goose.
Football	There are two medal competitions for Olympic football, one for men's teams and one for women's. Football was first played at the 1908 Olympic Games and it has been played at every Olympic Games ever since, except for Los Angeles 1932. Did you know? Hungary has won three football gold medals-more than any other country.
Taekwondo	This Korean sport's name means"the way of the hand and foot". The players get points by hitting each other with these two parts of the body only. The players mustn't lie on the floor and no equipment can be used. Taekwondo first appeared at the 2000 Sydney Games. Did you know? Over 60 million people from 190 countries around the world regularly take part in this sport.

1. Who invented the sport of badminton?

A. Indians.
B. British.
C. Chinese.
D. Koreans.

2. Which of these sports appeared earliest at the Olympics?

A. Archery.
B. Badminton.
C. Taekwondo.
D. Football.

3. Which sport was first named after a town?

A. Badminton.
B. Football.
C. Taekwondo.
D. Archery.

4. Which of the following picture shows the sport of"Taekwondo"?

5. Where can you most probably find web page?

A. Sydney 2000.com
B. Beijing 2008.com
C. Guangzhou 2010.com
D. London 2012.com

单项选择题

心肌灌注显像极坐标靶心图，是根据下列哪个图像制成（）

A.垂直长轴图像

B.水平长轴图像

C.LA045°图像

D.短轴断层图像

E.冠状断层图像