装运集装箱危险货物的车辆，其紧固装置必须牢固安全、有效，以保证车辆装载平衡，运输安全

我国有（　　）个直辖市。

Man:I'm really exhausted．But I don't want to miss the film that comes on at 11. Woman:If I were you, I'd skip it. We both have to get up early tomorrow. And anyway, I've heard it isn't that exciting. Question:What does the woman mean

A．The man should stay up and watch the program.

B．The man should read something exciting instead.

C．The man should go to bed at eleven.

D．The man should give up watching the movie.

不属于 * * 分泌物清洁度检查项目的是（）。

A.杆菌

B.球菌

C.真菌

D.上皮细胞

E.白细胞

造成我国大气污染最主要的污染来源是

A．火山爆发与森林火灾
B．地面扬尘
C．工业企业
D．生活炉灶
E．交通运输

《清明上河图》反映了南宋的民俗风情。