问题 单项选择题 A1/A2型题

关于慢性肺心病的病因的描述正确的是()

A.可由睡眠呼吸暂停综合征导致

B.80%~90%由支气管哮喘引起

C.最少见的是重症肺结核

D.胸廓运动障碍性疾病多见

E.肺血管疾病少见

答案

参考答案:A

解析:引起慢性肺源性心脏病的病因包括:支气管肺部疾病,胸廓运动障碍性疾病,肺血管疾病等,肺气肿、COPD为最常见病因。

单项选择题
阅读理解

Since the gene , called DAF-16 in worms, was found in many animals and in humans, the finding could open up new ways to affect aging ,immunity and resistance in humans the scientists said.

“We wanted to find out how normal aging is being governed by genes and what effect these genes have on other traits such as immunity,”said Robin May , who led the study.

Populations across the world are aging at a surprising pace , bring potentially big challenges for health and social care systems . A study by Danish scientists last year found that half of babies born in rich world today will live to celebrate their 100th birthday . Scientists are eager to find out how people age to try to develop drugs to help them stay healthier lives extend.

“What we have found is that things like resistance and aging tend go hand in hang “ May said in an interview

May’s team compared longevity ,stress resistance and immunity in four related species of worm. They also looked for differences in the activity of DAV-16 in each of the four species and found that they were all quite distinct.

May said DAF-16 was active in most cells in the body and was very similar to a group of human genes called FOXO genes , which scientists believe play a role in the aging process. “The fact that subtle differences in DAF-16 between species seem to have such an impact on aging and health is very interesting and many explain how differences in lifespan and related traits have arisen during evolution,”May said

小题1:In which section may the text appear in a newspaper?

A  Education   B  Science   C  Entertainment    D  Culture

小题2: According to May ,   

A resistance has a lot of to do with aging    B FOXO genes can be found in worms

C genes play the same role in difference species   D  new drugs will change the genes in older people

小题3:From the text we know that DAF-16   

A is a gene that is only found in worms     B can make people live longer

C has an effect on aging and immunity     D  has been quite familiar to scientists