题型:选择题 Hardly had all the points that the teacher taught down when the bell rang.A.to akenB.takingC.takenD.been taken 查看答案
题型:单项选择题 当柴油机气缸套产生较大拉痕、擦伤、磨台和过度磨损时,应拆下送厂采用()进行修理。Ⅰ.镀铬;Ⅱ.镗缸;Ⅲ.修理尺寸法;Ⅳ.喷焊;Ⅴ.恢复尺寸法。A.Ⅰ+Ⅲ+Ⅳ+ⅤB.Ⅰ+Ⅱ+ⅤC.Ⅱ+Ⅲ+ⅤD.Ⅰ+Ⅱ+Ⅲ 查看答案