.
A．
B．
C．
D．
参考答案：B
— So nice to see you, Lucy! I never thought you visit us today.
— Sorry, I forgot to tell you I was coming. I hope you don’t mind me _____.
A．calling in
B．pulling in
C．breaking in
D．dropping in
当存在软弱下卧层时，可以作为桩基持力层的最小粘性土层厚度为桩直径的多少倍？（）
A.4
B.5
C.8
D.6
