（）适用于承受较小冲击载荷的小尺寸零件，如活塞销、凸轮、齿轮等。
A．20Cr
B．20CrMnTi
C．18Cr2Ni4WA
D．20
参考答案：A
使君子最善驱杀( )
A．蛔虫 B．绦虫 C．蛲虫 D．钩虫 E．姜片虫
In relation to the law on partnerships:
(a) explain and distinguish between the liabilities of general and limited partners; (3 marks)
