---Ken,                        _, but your radio is going too loud．

---Oh,  I’m sorry． I’ll turn it down right now．

A．It doesn't hurt to ask

B．I'm crazy about it

C．I’m really tired of it

D．I hate to say it

其中把煤泥浮选的粒度划分描述错误的是（）。

A.过粗粒指：>1mm

B.粗粒指：0.5-0.074mm

C.细泥：0.074-0.01mm