【单选题】相比较而言,渐开线圆柱齿轮传动的中心距偏差要求_____,蜗轮蜗杆传动的中心距_____。
【单选题】Which of the following is a negative aspect of group norms?
A.
Being part of a group has the ability to increase an individual's antisocial actions.
B.
The most widespread norms are those related to dress codes.
C.
Groups become dysfunctional when they maintain strict norms.
D.
Norms do not influence employees' performance.
【判断题】冠心病患者,运动诱发左心衰竭与呼吸困难引起呼吸性缺氧并循环性缺氧。
【简答题】铁磁材料分为 材料、 材料和 材料三种。
【判断题】铁磁材料分为软磁材料、硬磁材料和矩磁材料三种。