CAN YOU BEACH means（）.

A.can you go to the beach

B.can you run the vessel upon a beach to prevent its sinking in deep water

C.can you handle the vessel along the beach

D.can berth along the beach

地铁工程中常用的盾构掘进机和工法有（）

A.土压平衡式

B.手掘式

C.泥水平衡式

D.挤压式

E.封闭式