水泥有效超过多少月时,则需要重新检验确定标号()。
A.12个
B.3个
C.6个
参考答案:B
_______was often the case, Miss Wang was the first to arrive at the school in the morning .
A.Which
B.What
C.As
D.It
()对于股权投资基金的成功运作发挥决定性作用。
A.资金
B.企业的投资价值
C.人力资本
D.激励约束机制