【简答题】设 是函数 的反函数,则 成立的 的取值范围是
【简答题】设指数函数 是 上的减函数,则 的取值范围是
【单选题】反应堆里与安全有关的各种控制系统,同时有几台仪表各自独立地进行同一参数的监测。当三台或四台仪表中有()台同时发出停堆信号,才会自动停堆。
【判断题】在拨道控制系统中根据输入的各种参数形成总拨道信号,再有总的拨道信号与液压伺服阀构成闭环控制。
【单选题】When we finally (finished) the (tiring) journey, we could (not hardly) move a step (further).
【单选题】Their plan was ____. With it we had little trouble in finishing the work.
【单选题】. We have finally finished it! When ______ the job if we had started it a week earlier?
C.
could we have finished
【单选题】The effort to prevent the tower from leaning, ____ we had expected, was a great success.
【多选题】下列各种接地方式中,属于防雷接地方式的有()
D.
三绕组电压互感器星形接线的一次绕组中性点接地;