When Mrs. Joseph Groeger died recently in Vienna, Austria, people asked the obvious, “Why
A. the complaints of people in apartment houses
B. the cause of Mrs. Groeger’s death
C. the longevity of people like Mrs. Groeger
D. the image of cities in general
查看答案
以下哪个部件在两轮驱动车辆上一般不会装备,而只用在四轮驱动车辆上?
A. 液力变矩器
B. 差速器
C. 分动器
D. 万向节
机械密封的冲洗目的是隔离介质,冷却和改善润滑。()