V型带传动的主要失效形式是（）。
A.带轮损坏
B.带断裂
C.打滑
参考答案：C
简述D/P和D/A的含义及它们的主要区别
What part of the museum flooded A. The central gallery. B. The storerooms. C. The gift shop. D. The central and southern rooms.
