炼焦用煤、高炉喷吹用煤分选深度宜为（）
A.0.5mm
B.0mm
C.1mm
D.3mm
参考答案：B
Look! What has happened. I'd rather you ______ her about the bad news. [ ]
A. would not tell
B. hadn't told
C. didn't tell
D. hasn't told
某种产品价格降低5%后的售价3.8元，求原价？
