TCR-CD3复合物分布于所有成熟D细胞表面，在该复合物中CD3分子的

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问题单项选择题 A1/A2型题

TCR-CD3复合物分布于所有成熟D细胞表面，在该复合物中CD3分子的主要作用是（）。

A.特异性识别抗原肽-MHC分子复合物

B.与LFA-3结合

C.传递T细胞激活信号

D.淋巴细胞归巢受体

E.参与再次免疫应答

答案

参考答案：C

阅读理解

阅读理解。

It's seven thirty now. It's time to go to school. Our classroom is behind the trees.It's very nice. There

is a map of China on the wall. Twenty boys and fifteen girls are in the classroom. There are some flowers

on the teacher's desk. They are for our teachers. We have four classes in the morning and two in the

afternoon. We aren't at school on Sunday.

1. The students go to school at_____.

A. 7:13

B. 7:03

C. 7:30

2.Their classroom is_____some trees.

A. behind

B. in

C. under

3. A map of China is on the_____.

A. desk

B. wall

C. blackboard

4. The_____are for the teachers.

A. maps

B. desks

C. flowers

5. There are_____students in this class.

A. forty-five

B. fifteen

C. thirty-five

单项选择题 B型题

高热2天未进食病人出现口渴、黏膜干燥、皮肤弹性下降（）

A.低渗性脱水

B.等渗性脱水

C.高渗性脱水

D.继发性脱水

E.水过多