【判断题】蜗杆传动的传动比是蜗轮齿数与蜗杆头数之比。
【简答题】What is the training about?
【判断题】产品专业化模式能分散企业经营风险,即使其中某个子市场失去了吸引力,企业还能在其他市场获利,但产品有了替代品就会给企业造成威胁。( )
【判断题】蜗杆传动与齿轮传动相比,蜗杆传动的传动比较大,传动平稳性高。
【单选题】What is communication training about?
A.
The procedures at more than 100 veterans hospitals.
B.
Sharing cases of successful and unsuccessful operations with peers.
C.
Sharing information and ideas about the operation and the patient before, during and after the operation.
D.
Working out the causes of the 50 percent reduction in the mortality rate in veterans’ hospitals.
【判断题】蜗杆传动的传动比与齿轮传动的传动比的计算公式一样,即 = / = / .
【判断题】蜗杆传动的传动比是蜗轮齿数与蜗杆头数之比。