党风廉政建设领导机制和工作机制是（）。A、党委统一领导 B、纪委组织协调 C、部门各负其

根据句意，用所给动词的适当形式填空。

1. It is a fine day. The sun _________ (shine) brightly.

2. They _________ (visit) the Science Museum next Sunday.

3. Mr Brown _________ (live) in Beijing since he came to China.

4. Mr Wang _________ (teach) us English two years ago.

5. The Smiths __________ ( watch) TV at this time last night.

6. We _________ (learn) about ten English songs by the end of last term.

7. Father said that he _________ (buy) a new bike for me the next Friday.

8. Bill isn't here. He _________ (chat) with his friends in the classroom.

9. The teacher said that the moon _________ (go) round the earth.

10. The Young Pioneers will go to the zoo if it _________ (not rain) this Sunday.

能产生B细胞活化所需第2信号的分子对是（）

A.IL－2与IL－2R

B.CD8与MHC－Ⅰ类分子

C.CD40与CD40L

D.Fas与FasL

E.BCR与B细胞表位

论述预订中容易产生的纠纷及原因。

寒湿泄泻的特点是

A．大便清稀，甚如水样

B．大便溏泻，完谷不化

C．大便溏垢，臭如败卵

D．大便黄褐，气味臭秽

管道安装时，异径管采用（）进行焊接。

A、弯头

B、变径接头

C、等径接头

D、三通