外圆车刀安装时,刀杆伸出适当位置应为()
参考答案:刀杆厚度的1.5-2倍
At the beginning of class, the raise of desks could be heard outside the classroom. [ ]
A. opened and closed
B. to be opened and closed
C. being opened and closed
D. to open and close
限仓制度是交易所建立大户报告制度后,当会员或客户的持仓量达到交易所规定的数量时,必须向交易所申报有关开户、交易、资金来源、交易动机等情况,以便交易所审查大户是否有过度投机和操纵市场行为,并判断大户的交易风险状况的风险控制制度。()