【判断题】冲孔和落料都是在冲裁时,材料的一部分与另外一部分沿封闭曲线发生分离。( )
【单选题】Charlie Chaplin is considered a great contribution to the film industry. A. to make B. making C. to have made D. having made
【单选题】E玫瑰花结形成试验的原理是因为SRBC可与
【单选题】It was _____ so that made Jim very angry.
【单选题】As a boy, he was_______ hard all day long.
【单选题】E玫瑰花结形成试验的原理是因为SRBC可与
【单选题】The mixture smelt terrible but Tom _____ taste it. [ ]
【单选题】The little boy ____ by the big one this morning.
【判断题】材料的一部分与另外一部分沿封闭曲线发生分离,分离曲线内部是零件的冲压基本工序是冲孔。( )
【单选题】The servant ______ all day and all night.