对放射免疫分析叙述不正确的是（）。 A.特异性强 B.敏感度高 _爱下问搜题

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问题单项选择题 A1/A2型题

对放射免疫分析叙述不正确的是（）。

A.特异性强

B.敏感度高

C.标本需要量小

D.重复性差

E.伴有不同程度放射性污染

答案

参考答案：D

解析：放射免疫技术灵敏度高，特异性强，重复性好，可用于小分子量和大分子量物质定量测定。

阅读理解

任务型阅读。

A. Christina is a working mother with a two-month-old son. Her house is very far from her office. She
spends much time on the way. If she goes on working, she will miss the wonderful time with her son.
But she must work to get enough money to support her family. She needs some help.

B. Pierre moved to London with his family a month ago. He has no friends there. He is going to school
in three days. But he is afraid his classmates will laugh at his accent. He would like to go back to his
village. What will he do?

C. Lisa is sixty-five years old and she will have nothing to do. She is an active person and it will be
impossible for her to sit around the house. If she spends her time going on trips or walking in the park,
she will feel herself useless. Any ideas?

D. Mario is a writer. He has just come to Los Angeles to work. But it's so noisy that he can't put his
heart into writing. He wants to find a house in a quiet place．Who can help him?

E. Cindy is the leader of her class. Next week they will have a class picnic. The girls want to make some
delicious food for the picnic. But they don’t know how to cook well. Cindy feels worried.

( )1. He/She could put an advertisement in a newspaper, and describe what his/her dream house is like.
( )2. He/She could do some work around the neighborhood and help others with his/herexperience.
( )3. He/She can join a language club. and make some friends.
( )4. He/She could look up some recipes for the food or learn from his/her parents.
( )5. He/She could look for a job near his/her house to save time.

单项选择题

A．'
B．:
C．;
D．!