【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?
【单选题】与蜗轮蜗杆传动相比,齿轮传动机构的特点是( )。
【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 did Bob worry about?
A.
He worried about his life after being fired.
B.
He worried that his children would not work hard in their studies.
C.
He worried about the lack of chance to cook.
D.
He worried that he couldn’t be an athlete.
【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】蜗杆传动的传动比是蜗轮齿数与蜗杆头数之比。