炮眼封泥应用（），其剩余的炮眼部分应用粘土炮泥封实。

A.水炮泥

B.煤粉

C.炮土

（）doesn’t need to change package of goods or to stop in any place between the origin and destination point.

A. Through transport 

B. Transfer transport  

C. combined transport  

D. Motor transport