用球磨机对粉料进行粗磨时，常使钢球的运动状态处于（）状态。
参考答案：抛落
It's no such ________ long distance from here to ________ supermarket. We can walk there. [ ]
A. a; the
B. the; a
C. /; the
D. /; a
( )应逐盘进行抗拉强度、伸长率和弯曲试验。
A．冷拔低碳钢丝
B．精轧螺纹钢筋
C．冷拉钢筋
D．热处理钢筋
