I’m sorry. I was under ________impression that you were________general manager of your company.

A．an；/　　　　

B．/；a　　　　

C．an；a　　　　

D．the；/

在用砂桩处理松砂地基的条件下，已知松砂地基e_max=0.9，e_min=0.6，e₀=0.8，砂桩为等边三角形布置，d=0.6m，l=6m，加固后地基相对密度为0.7，砂桩间距s为（）m。

A．1.07

B．1.50

C．2.05

D．2.31