问题 单项选择题 A1/A2型题

下列选项中属于机体特异性免疫应答的是 ()

A.胃液的杀菌作用

B.巨噬细胞的吞噬作用

C.中性粒细胞增多

D.白细胞介素-2分泌增多

E.杀伤性T淋巴细胞活性增强

答案

参考答案:E

解析:机体特异性免疫应答是在抗原刺激下,T细胞发生的以产生特异性激活的效应T细胞和多种细胞因子为特点介导的细胞免疫;而B细胞介导的免疫应答最后能产生特异性抗体,并将之分泌入体液,故把B细胞介导的免疫应答称为体液免疫。

判断题
阅读理解

阅读理解。

     Last week my youngest son and I visited my father at his new home in Tucson, Arizona. He moved there

a few years ago, and I was eager to see his new place and meet his friends.

     My earliest memories of my father are of a tall, handsome, successful man devoted to his work and family

but uncomfortable with his children. As a child I loved him; as a school girl and young adult,I feared him and

felt bitter about him. He seemed unhappy with me unless I got straight As and unhappy with my boyfriends if

their fathers were not as "successful" as he was. Whenever I went out with him on weekends, I used to

struggle to think up things to say, feeling on guard.

     On the first day of my visit, we went out with one of my father's friends for lunch at an outdoor cafe. We

walked along that afternoon, did some shopping, ate on the street table, and laughed over my son's funny facial

expressions. Gone was my father's critical (挑剔的) air and strict rules. Who was this person I knew as my

father, who seemed so friendly and interesting to be around? What had held him back before?

     The next day my dad pulled out his childhood pictures and told me quite a few stories about his own

childhood. Although our times together became easier over the years, I never felt closer to him at that moment. After so many years, I'm at last seeing another side of my father. And in so doing, I'm delighted with my new

friend. My dad in his new home in Arizona is back to me from where he was.

1. Why did the author feel bitter about her father as a young adult?

A. He did not love his children.

B. He was too proud of himself.

C. He was silent most of the time.

D. He expected too much of her.

2. When the author went out with her father on weekends, she would feel ______.

A. nervous

B. sorry

C. tired

D. safe

3. What does the author think of her father after her visit to Tucson?

A. More critical

B. More talkative

C. Gentle and friendly

D. Strict and hard-working

4. The underlined words "my new friend" in the last paragraph refer to _______.

A. the author's son

B. the author's father

C. the friend of the author's father

D. the cafe owner