问题 单项选择题 B型题

α-甲基多巴引起溶血性贫血()

A.抗独特性抗体

B.抗同种型抗体

C.交叉反应性抗体

D.隐蔽抗原

E.修饰的抗原

答案

参考答案:E

解析:1.α-甲基多巴可对红细胞抗原性进行修饰,导致交叉抗体产生,在无α-甲基多巴情况下此抗体可与未修饰的红细胞反应。 2.眼晶状体蛋白为隐蔽性抗原,外伤导致晶状体蛋白释放往往引起交感性眼炎。 3.Guillain-Barre综合征是病毒与神经细胞间的交叉抗原引起的自身免疫反应。

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 now 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 (成年人) I feared him and felt bitter about him. He

seemed unhappy with me unless I got straight A's 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 was silent most of the time.

B. He was too proud of himself.

C. He did not love his children.

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 

单项选择题