客户的委托指令若未能全部成交，只要当日还未收盘，证券经纪商应继续执行指令．
参考答案：对
—What's this?
—_______. [ ]
A. It's a bread
B. It is a bread
C. It's bread
D. This's bread
下列材料（）的焊接属于异种金属焊接。
A、奥氏体钢与珠光体钢
B、Q235钢与低碳钢
C、铜与铝
D、低碳钢上堆焊不锈钢
