工件经淬火后,表面硬度较高,一般不再用金属切削刀具进行切削加工。( )
参考答案:对
—Tom, it's cold outside, ______ your coat when you go out.
—OK, Mom. [ ]
A. Take off
B. Take away
C. Put away
D. Put on
根据《期货交易管理条例》规定,所有的期货交易所均应当建立、健全结算担保金制度。( )