进行孔类零件加工时,钻孔—扩孔—倒角—铰孔的方法适用于()。
A、小孔径的盲孔
B、高精度孔
C、空位置精度不高的孔
D、大孔径的盲孔
参考答案:C
—____ the workers are very tired, _____they keep on working.
— They are great. We must learn from them.
A.Because; /
B.Though; /
C.Because; so
D.Though; but
电缆的主要电气性能包括电缆的电阻、()和电感。
A.电容
B.电压
C.电流
D.功率