【单选题】The electricity company are threatening to ______ us _____.
【单选题】When we are born, we have 300 bones, but by _______________, we have only 206.
【简答题】A.cut off B.cut across C.cut down D.cut in
【单选题】It's bad to ___________the trees. [ ]
【单选题】They’ve () several scenes in which I appeared.
【单选题】移动式插座的电源连接线应符合( )要求。
【判断题】列车火灾因着火部位不同可分为列车头部火灾 、 列车中部火灾 和列车尾部火灾。