在实际监理过程中,必须坚持监理工作“( )”的基本原则。
A．先审核后勘察 先验收后施工
B．先抽查后审核 先审核后实施
C．先审核后实施 先勘察后施工
D．先审核后实施 先验收后施工

W: When will you be back?M: In an hour.W: Can you come much earlier?What does the man mean?（）

A．It'll be too early.
B．It'll be a bit late.
C．He doesn’t Want the woman to leave.

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已知a1=1 (√2-1),a2=1 a1,a3=1 a2,a4=1 a3,…,则a2015=（）. 点击查看答案