在装配中,要进行修配的组成环叫封闭环。
参考答案:错
People in Korea _____ bow when they meet for the first time.[ ]
A. supposed to
B. are suppose to
C. are supposed
D. are supposed to
调车作业要准确掌握速度,调动超限货物的车辆时,不准超过()。
A、10km/h
B、15km/h
C、20km/h
D、25km/h