粉碎的物料通过筛子或分级设备使粗颗粒重新返回到粉碎机
A．开路粉碎B．闭塞粉碎C．干法粉碎D．循环粉碎E．自由粉碎
参考答案：D
怎样看待艺术中的丑？
One of the few things you say about English people with certainty is that they ______ talk a lot about the weather.
A．need B．mustC．should D．can
