问题 单项选择题

以下哪项不是免疫佐剂的作用()。

A.增强免疫原性

B.增加抗体的滴度

C.引起迟发型超敏反应

D.增强迟发型超敏反应

E.引起速发型超敏反应

答案

参考答案:E

解析:应用佐剂的目的是为了增强抗原对机体的免疫原性,从而提高免疫应答水平,增加抗体的滴度,引起或增强迟发型超敏反应。

阅读理解

阅读理解。

    Mr. Gao lives in a town. When he was twenty-five, his son was born (出生). He called

him Gao Ling. The little boy is very clever and his parents love him very much.

    It's September 1 today. A new school year begins. Gao Ling is happy and wears his most

beautiful clothes. He's going to school with his new bag.

    "Let me take you to school today, dear," says Mrs. Gao.

    "Thank you, Mum." says the boy. "The school is not far from here. I can walk there

myself."

    At school a teacher meets the little boy and asks,"What's your name, my little friend?"

    "Gao Ling, sir." answers the boy.

    "How old are you?"

    "Six, sir."

    "What's your father's name?"

    "Gao Dalin, sir."

    "How old is he?"

    "He's six too, sir."

    "Oh," he says in surprise. "Is he as old as (一样大) you?"

    "Yes, sir,"says the boy. "He became (成为) a father at the time when I was born."

1. Mr. Gao is _____ now.

A. six

B. twenty-five

C. thirty one

D. thirty-five

2. Mr. and Mrs. Gao love their son because _____.

A. the boy is clever

B. he likes to go to school

C. he can go to school himself

D. he can answer their question

3. Gao Ling didn't let his mother take him to school because _____.

A. she was too busy

B. his friends could took him

C. the policeman could help him

D. the school is near and he could take care of himself

4. Gao Ling went to school _____.

A. by car

B. on foot

C. by train

D. by bike

5. Gao Ling thought _____.

A. his father and he were born on the same day

B. his father was younger than him

C. his father forgot to tell him about his age

D. Gao Daling became a father only for six years

单项选择题