Thank you for all your hard work last week. I don't think we _____ it without you. [ ]

A. can manage

B. could have managed

C. could manage

D. can have managed

在轧钢生产过程中测量仪表所检测的参数是多种多样的。常见的有（）等。

A.温度

B.压力

C.轧件尺寸

D.速度