挥刀时正确的用力顺序是（）
A腕部、肩部、肘部、腿部
B肩部、腰部、腿部、脚部
C腿部、腰部、肩部、腕部
参考答案：C
― Do you want to be a businessman when you ________?
― I don't think so. It's too hard and busy. [ ]
A. grow up
B. come up
C. get up
D. make up
横拉条有任一横断面直径细至原始（）直径时，需补强。
A.80%
B.60%
C.75%
