环式碎煤机环锤的旋转轨迹与筛板之间的间隙应符合要求，一般为（）mm.
参考答案：20—25
不健康的生活方式是[ ]
B．按时作息
C．不吃早餐
D．坚持体育锻炼
--- Look, this pair of shoes beautiful, right?
--- Yes. But they don’t fit me .
A．is, very much
B．is, very well
C．are, very much
D．are, very well
