《水法》规定，在水工程保护范围内禁止进行的活动有（）
A.爆破
B.钓鱼
C.打井
D.采石
E.取土
参考答案：A, C, D, E
Don’t call him at this time tomorrow, because he _________ a meeting with his teachers.
A．is having
B．is going to have
C．will be having
D．has been having
一般情况下，500千伏降压变压器分接头是在（）侧。
A、35千伏
B、500千伏
C、220千伏
D、均可以
