焊缝尺寸符号是表示坡口和根部间隙尺寸的符号。
参考答案：错
国家是维护( )的暴力组织。
A．统治阶级利益
B．被统治阶级利益
C．剥削阶级利益
D．人民群众利益
— Whenever you are short of money, just come to me.
—
A．Do you really mean it?
B．I can’t believe it.
C．That’s something.
D．What’s up?
