We went right round to the west coast by ________sea instead of driving

across_________ continent.                                                              [ ]

A. the;the                          

B./;the

C. the;/                           

D. /;/

在填土压实施工中，适用于大面积非黏性土回填压实的方法是( )法。

A．振动压实

B．内燃夯土机夯实

C．羊足碾碾压

D．蛙式打夯机夯实