（）可把回转运动变为直线运动。
A.螺旋传动
B.带传动
C.齿轮传动
D.蜗轮蜗杆传动
参考答案：A
To our joy, only a small number of people voted against it, and the majority were it.
A．in honor of
B．in place of
C．in favor of
D．in memory of
在160Km/h及以上区段室外一切作业必须严格执行什么？
