【判断题】在蜗杆传动中,进行齿面接触疲劳强度和齿根弯曲疲劳强度计算是以蜗轮为主,而进行刚度计算则是以蜗杆轴为主。 ( )
【判断题】在蜗杆传动中,进行齿面接触疲劳强度和齿根弯曲疲劳强度计算是以蜗轮为主,而进行刚度计算则是以蜗杆轴为主。
【简答题】Because of falling orders, the company has been forced _____several hundred workers. A. laying down B. to lay aside C. laying off D. to lay off
【单选题】What is the main topic of the passage?
A.
The great pressures of the Sun.
B.
The high temperature of the Sun.
C.
The structure of the Sun.
【单选题】{ 根据图示三种材料拉伸时的应力一应变曲线,得出如下四种结论,请判断哪种是正确的 }
【单选题】WHO新分类中成釉细胞瘤4种临床病理行为不同的变异型不包括
【单选题】This apple tastes so .