轴承合金牌号中的代表字母是（）。A.Z B.KT C.Zch D.G

A              has stripes.[ ]

A. kangaroo       

B. tiger         

C. zebra

The teacher couldn't make himself ___ attention to because the students were so noisy. [ ]

A. to pay        

B. to be paid    

C. paid        

D. pay

We didn't know whether he ________ speak at the meeting. [ ]

A. is going to

B. was going to

C. went  

D. goes

集团彩铃月功能费（）元/月（金华除外）。

A.5元

B.6元

C.10元

D.8元

安全文化建设主要包括建立机构、（）步骤。

A.制定规划

B.培训骨干

C.宣传教育

D.努力实践