汽车转向轮主销内倾角的效果是（）。
A.减少车轮磨损
B.转向操纵沉重
C.回正车轮
D.满载时，减少车轮内倾
参考答案：C
—I ________ my son to Laos for sightseeing.
—I would rather you didn't do that，for the bird flu ________ several lives there.[ ]
A. took;claimed
B. am taking;has claimed
C. took;had claimed
D. will take;claimed
下列选项中，（）不属于草坪修剪机的日常保养范畴。
A、清洁切割器
B、检查机油油位
C、清洗气缸
D、检查螺丝松紧
