低碳钢管子、联箱和管件等受压元件的焊接接头焊后，均不须进行热处理。
参考答案：错
行业生命周期分为四个阶段，市场营销和生产管理是( )的关键性职能。
A．形成期 B．成长期C．成熟期 D．衰退期
— Are you getting a new apartment this year?
— ______ I can't afford my bills, let alone a new apartment.[ ]
A. Give me a moment.
B. You're missing the point.
C. Don't mention it.
D. You must be joking.
