对水库水电站运行带来风险的有()。
A.来水的不确定性
B.人为决策的不确定性
C.电网负荷需求的不确定性
D.设备运行的不确定性
参考答案:A, B, C, D
近似数0.09070的有效数字和精确度分别是( )
A.四个,精确到万分位
B.三个,精确到十万分位
C.四个,精确到十万分位
D.三个,精确到万分位
_______ the school, the village has a clinic, which was also built with government support.
A.In reply to
B.In addition to
C.In charge of
D.In place of