为适当提高低碳钢的硬度，使其便于切削加工，常对其进行完全退火处理。
参考答案：错
在设置文字格式之前首先要（）文字
— Dave is always making the same mistake. It worries me a lot.
— Take it easy. , he is only a child.
A．First of all
B．All in all
C．In all
D．After all
