MA.cTA.vish型风分机在风分过程，风分风量的大小调节（）。
A、风门
B、变频调频器
C、电机传动三角带
D、网面速度
参考答案：C
The teacher had a _____ look when he found that none of his students had finished his homework. [ ]
A. shocking
B. shocked
C. bored
D. boring
B．物体由静止开始运动，是外力使物体的惯性被克服了，才使运动状态改变了
C．物体速度越大，惯性越大
D．惯性是物体的固有属性，只要物体存在，惯性就确定了
