问题 单项选择题

某患者一只眼球受伤导致晶状体破裂,若不立即摘除,则另一健康眼睛也将失明,这在免疫学上称为自身免疫病,其主要致病过程如图。下列有关表述正确的是()。

A.①代表过敏原

B.②代表溶酶体酶

C.③保留了对抗原的记忆

D.③在再次接触相同抗原刺激时,可合成并分泌抗体

答案

参考答案:C

解析:①是抗原,故A错误。T细胞分泌的②是淋巴因子,过B错误。能产生抗体的是④浆细胞,③是B细胞分化成的记忆细胞,故C正确,D错误。考点:本题考查免疫调节相关知识,意在考察考生对知识点的理解掌握程度。

阅读理解

I’ve often wondered if I might do more good as a travel agent rather than as a psychologist. It seems that I have been more dramatically affected by certain kinds of travel experiences than I ever have.

My trip to Iceland is a fine example of that. The plan was to spend two days in a remote mountain hut in Iceland. I was working on a photographic book about winter in Iceland and needed to capture images of this amazing region of high mountain peaks, smoky volcanoes, and lakes with floating icebergs.

The moment after we arrived, the weather turned extreme making visibility impossible. It snowed so much and the wind blew so hard that we couldn’t leave the tiny hut. To stay warm, we walked around in circles much of the day inside the tiny hut. We tried to call for help but the radio did not work. Day after day, we watched our supplies of food and fuel grow dangerously short. We got acute cabin fever (幽居病) and started going for walks and ski expeditions outside. Even when the weather finally broke, nobody came to get us even though it was three days beyond our scheduled pickup. By the time the rescue team came to pull us out, we had all given up hope.

From then on, the world looks different to me, as does my life. It would have taken me years of psychotherapy to get to the same point.

Almost everyone has a story to tell, and interestingly, most of these experiences were not altogether pleasant at the time. In fact, it appears that the most constructive life-changing journeys were those that involved some sorts of awful and uncomfortable events that forced the person to develop new resources, increase confidence, and solve problems in new ways.

小题1:The writer went to Iceland to ______.

A.enjoy the natural beautiful floating icebergs

B.take photos about the region for a book

C.collect materials for psychological research

D.challenge the high mountains there小题2:During the trip in Iceland, those travelers faced difficulties EXCEPT that ______.

A.they got lost in the mountain

B.they were short of food and fuel

C.they couldn’t see the surroundings clearly

D.they failed to get in touch with the rescue team小题3:From Paragraph 3, we learn that the travelers ______.

A.were in despair before they were rescued

B.stayed in the hut for three days altogether

C.got sick because of going for ski outside

D.got rescued immediately the weather turned fine小题4:Which of the following statements is true according to the passage?

A.The writer is a travel agent who loves difficult challenges.

B.In Iceland the weather is always extreme and it snows a lot.

C.The travellers were so depressed that they needed psychotherapy.

D.Awful journeys may become life-changing events that inspire people.

单项选择题