对存有残余油脂的容器，只要用水冲洗后，就可进行焊接。（）
参考答案：错
--- Would you mind if I smoked here?
--- _________. It’s a non-smoking area here.
A．Yes, please
B．Not at all
C．I’d rather you didn’t
D．Never mind
什么是商品粮？
