Jack and Mike were found cheating in the exam, and _____ by their teacher at the moment.

[      ]

A. were scolded

B. are being scolded

C. have been scolded

D. were being scolded

在渣流动性良好的情况下，铝的收得率主要与以下因素有关（）。

A.渣中不稳定的氧化物

B.钢液温度

C.钢液含硫量

D.钢液装入量