tan2010°的值为______．
tan2010°=tan（5×360°+210°）=tan（180°+30°）=tan30°=33
故答案为33
He ___ his students’ respect after working with them for 3 years.
A．received
B．won
C．accepted
D．took
某工程双代号时标网络计划如下图所示，其中工作E的总时差为（）周。
A．0
B．1
C．2
D．3
