传动轴在高速旋转时，为防止离心力的作用将产生剧烈振动，必须满足（）要求
A. 平衡
B. 良好的润滑
C. 合适的尺寸
D. 可靠连接
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汽车主减速器圆锥主动齿轮轴承()，会导致后桥有异响，并伴随后桥壳的温度升高。A.损坏
A. 过紧
B. 过松
C. 磨损
a__________ n. the amount of sth. one can hold in one arm or both arms
a_________ v. to tell sb. that sth. is sure to happen so that he does not have to worry
d___________ n. a place sb. is going to
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