【单选题】The electricity company are threatening to ______ us _____.
【简答题】A.Only if we have much in common. B.Only if we know our friends’mistakes. C.Only if we treat our disagreements wisely. D.Only if we have known one another for long.
【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。