挖掘机回转支承需要定期加注润滑剂，一般每间隔（）小时加注一次。
A.200
B.300
C.500
D.600
参考答案：C
Only those _____ knew well could be let in.[ ]
A. who
B. he
C. that
D. what
(c) State how a company can get relief for a loss incurred on the sale of quoted shares. (2 marks)
