用成形刨刀刨削斜面时，切削速度和进给量要大.
参考答案：错
Take care not to get your shoes ______ in mud．
A．wet or covered
B．to be wet or covered
C．to be wet or covered
D．wet or be covered
A．在0.1秒时的位移是3cm
B．在0.1秒时的速度最小
C．在0到0.1秒时间内的路程是4cm
D．在0.1秒时的速度向下
