—Something really strange happened to me last night.

—Yeah? ___________,David?

A．Tell me

B．What was that　

C．I can’t believe it

D．How it happened 

影响填土压实的影响因素有（）

A、压实功

B、土的含水量

C、每层的铺土厚度

D、土的种类

E、土的密度