根据顾客对内在质量特性的不同要求,产品质量战略可分为()
A、产品性能战略
B、短命产品战略
C、长命产品战略
D、适中寿命战略
E、产品寿命战略
参考答案:A, E
—Who told you to clean the windows?
—Father ______. He said they are too dirty. [ ]
A. told
B. did
C. had told
D. has told
锥齿轮偏铣时,若偏量和回转置控制不好会使齿轮齿圈径向跳