. John received an invitation to dinner,

— Would you like to watch the basketball match with me this evening?

—       . I like basketball very much. [ ]

A. I'd love go          

B. Not really

C. I wouldn't go        

D. Thank you all the same

已知如图，匀强电场方向水平向右，场强，丝线长L=40cm，上端系于O点，下端系质量为，带电量为的小球，将小球从最低点A由静止释放，求：

⑴小球摆到最高点时丝线与竖直方向的夹角多大？

⑵摆动过程中小球的最大速度是多大？

I met Tom yesterday.  I_____ him since we left school.          [ ]

A. have not seen  

B. saw          

C. didn't see      

D. hadn't seen

留党察看期限最长不得超过（）年。

A、1

B、2

C、3

D、4

对于现场组焊的用于盛装液化气的球型储罐容器，当容器壁厚大于等于40mm时，对于焊缝内部缺陷的探伤适用的探伤方法是（）。

A、射线检测+超声波检测

B、射线检测

C、超声波检测

D、依具体情况定