刮削工件边缘时，近边缘落刀要()，远边缘起刀要()。
A.快、慢
B.准、慢
C.准、及时
D.慢、快
参考答案：C
一位同学从操场的中心o出发，向北走了40m到达B点。然后又向东走了30m到达C点,，如果以坐标原点0表示出发点.
（1）在坐标系中标出该同学的总位移；
（2）该同学的总位移多大?
—There is something wrong with my car. I have to walk to the office tomorrow.
—Don't worry! I can ________ you ________ if you like.[ ]
A. pick; out
B. pick; up
C. take; up
D. bring; up
