产品方案在______研究的基础上形成。
A．竞争状况
B．产品组合
C．市场容量
D．资源分析
参考答案：B
The director made the demand that she __________ the dangerous place as soon as possible.
A．left
B．would leave
C．leave
D．was leaving
轧件宽度对轧制力的影响是轧件宽度越宽，则轧制力越大。
