装饰抹灰用的石粒,使用前必须冲洗干净。( )
参考答案:对
______ for our dreams, as the principal addressed at the graduation ceremony, offers us a sense of belonging.
A.Being struggled
B.Struggling
C.Struggle
D.To be struggled
在下图所示的双代号网络计划中,工作C的总时差为()。
A.0
B.3
C.5
D.8