问题 单项选择题

心尖四腔切面取样,正常成人三尖瓣与二尖瓣舒张期多普勒血流频谱正确的为

A.三尖瓣血流频谱为负向,二尖瓣为正向

B.三尖瓣血流频谱呈单峰

C.血流频谱幅度三尖瓣大于二尖瓣

D.血流频谱幅度三尖瓣小于二尖瓣

E.舒张早期血流频谱速度三尖瓣大于二尖瓣

答案

参考答案:D

解析:四腔心切面上见三尖瓣口出现与二尖瓣相似的有规律的血流频谱,血流幅度小于二尖瓣。

单项选择题
阅读理解

A controversial new study has claimed that men really are more intelligent than women.The study concluded that men’s IQs are almost four points higher than women’s.

British-born researcher John Philippe Ruston says the finding could explain why so few women make it to the top in the workplace.

He claims the “glass ceiling” phenomenon is probably due to inferior intelligence,rather than lack of opportunity.

The University of Western Ontario psychologist reached his conclusion after scrutinizing the results of university ability tests taken by 1 00,000 students aged 17 and 18 of both sexes.

A focus on the factors such as the ability to quickly grasp a complex concept,verbal reasoning skills and creativity― some of the key factors of intelligence ―showed the male teenagers had IQs that were an average of 3.63 points higher. The average person has an IQ around 100.The findings,which held true for all classes and levels of education, overturn 100 year opinion that men and women average the same in general mental ability. They also conflict with evidence that girls do better in school exams than boys.

But Professor Ruston argues that the faster maturing of girls leads to them outshining boy in the classroom.

小题1: The report is mainly about ______.

A.a study that shows men are cleverer than women

B.the “glass ceiling” phenomenon

C.Professor Ruston’s theory on IQ

D.the difference between male and female小题2: The underlined word “scrutinizing” in the fourth paragraph probably means ______.

A.making up

B.carrying out

C.examining carefully

D.looking at小题3: We can infer that the average woman has an IQ of ______.

A.a little less than 100

B.100

C.more than 100

D.96.37