多项选择题
A.年龄和性别B.文化程度C.技能D.身体状况
A.斜齿轮副的螺旋角不一致。B.轴承损坏。C.润滑不良。D.装配不当。
A.That's one of the best ideas l've heard in weeks. What should we take on the picnic?B.I'd like to very much,but I have to prepare for my examination.C.That's great!Shall we go to the seaside for a walk?