盘式刹车刹车块更换后，新刹车块需经过贴磨直接接触面积达（）以上才能使用。A、75%

清政府在今新疆地区实行的特殊行政管理制度是( )

A．盟旗制度
B．伯克制度
C．土司制度
D．旗民分治制度

Alen Bishop earned the fight to use the CFA designation in September 1968. Alen recently retired from the investment management profession. As he is retired, Alen no longer attends CFA Institute society meetings and has stopped paying his CFA Institute dues. According to the Standards of Practice Handbook, how should Alen refer to his affiliation with the CFA Program()

A. Alen Bishop, CFA.

B. Aien Bishop, CFA (retired).

C. "I was awarded the CFA charter in 1968."

金属材料在无限多次交变载荷作用下而不发生断裂的最大应力称为（）。

A、屈服极限

B、疲劳强度

C、强度极限

D、弹性极限

前囟过大可以反映的疾病是

A．小头畸形
B．脱水
C．侏儒症
D．脑水肿
E．甲状腺功能低下

驼峰自动化系统监测“钓鱼”的方法是通过什么来完成的？