问题 单项选择题 B1型题

特异性免疫应答的有关概念中,"表现为特定的免疫细胞克隆仅能识别特定抗原(决定基);应答过程形成的效应细胞和抗体仅与诱导其产生的抗原(决定基)发生特异性反应"属于()

A.抗原(Ag)

B.免疫应答

C.免疫应答的特异性

D.免疫应答的记忆性

E.免疫应答的耐受性

答案

参考答案:C

阅读理解

阅读理解。

     I never wanted a dog, but now I'm so glad I have one.

     About one year ago, my wife, Mary, got a little dog with a face only a mother could love. We named

her Baby.

     Baby is the kind of dog that has to grow on you. So I decided that the dog would be trained. This didn't

quite go as planned. At 15 weeks old, she was nearly made to leave the Petsmart Training School. She spent

every night lying in our bed-snoring (打鼾) so loudly that I hardly got a good night's sleep.

     Then, about six months after she arrived, I felt that something in my heart was taking place, and I was

unable to stop it. My behavior (行为方式) began to change. I began to smile at people when passing them

in a street. I returned from neighbors. I started calling my kids and, to my surprise, they started calling me.

I even tried to speak to my grandchildren over the phone once. I even was glad to listen to laughter from a

10-month-old granddaughter. The point is that I was changing.

     My wife and I both agree that it is Baby who has changed my behavior.

     Baby is now nearly one year old and almost fully grown. I have come to like the pet little by little, though

she is my wife's dog.

1. What did the man think of the dog at the beginning?

A. It wasn't very lovely.

B. It looked very beautiful.

C. It wasn't necessary to be trained.

D. It could change his life.

2. When did the man's behavior begin to change?

A. About one year ago.

B. When Baby was nearly one year old.

C. When Baby was 15 weeks old.

D. About six months after Baby arrived.

3. Which of the following is NOT mentioned about the man's change?

A. He began to smile at people.

B. He liked helping his neighbors.

C. He started calling his kids.

D. He spoke to his grandchildren over the phone.

4. What can we learn from this passage?

A. The dog has been trained very well.

B. The man has become more confident (自信的).

C. The man has become more friendly.

D. The man likes the dog better than his wife.

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