YJ17供料系统烟丝输送带检查时应检查输送带是否有（）现象及跑偏现象。
参考答案：凹凸不平
The Disneyland will be built in Shanghai. It must be a wonderful place the family take a
vacation.[ ]
A. of, to
B. with, for
C. for, to
十字接头
