爆扩成孔灌注桩的主要优点是()
A.适于软土中形成桩基础
B.扩大桩底支撑面
C.增大桩身周边土体的密实度
参考答案：B
You must let me have the annual report without ______ by ten o' clock tomorrow morning.
A．failure
B．hesitation
C．trouble
D．fail
表外业务包括哪些内容？
