结构化分析方法是一种预先严格定义需求的方法，它在实施时强调的是分析对象的 ( )。
A．控制流
B．数据流
C．程序流
D．指令流
参考答案：B
— Have you heard of that?Tom recently bought a new car and an expensive flat.
— ________? He even couldn’t have enough money to pay for the rent.
A．How about
B．Why not
C．How come
D．So what
已知某班24小时出矿率是85%，消耗混合料量为4200吨，求烧结的日产量是多少吨？
