题目内容

轴承端泄量大,承载能力高,温升高

A. 轴颈和轴瓦表面之间构成楔形间隙
B. 轴颈和轴瓦表面之间有相对滑动
C. 充分供应润滑油
D. 润滑油温度不超过50℃

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与滚动轴承相比较,在下述各点中,________不能作为滑动轴承的优点。

A. 径向尺寸小
B. 运转平稳,噪声低
C. 间隙小,旋转精度高
D. 可用于高速场合

The latest ________ of China Today reports the daily life of Chinese panda named Le Le.

A. copy
B. book
C. issue
D. sheet

If the package is wrapped well, we ________ the contents are also wonderful.

A. resume
B. assume
C. consume
D. presume

Mr. Smith _______ as a doctor from London University over 30 years ago.

A. qualified
B. became
C. turned into
D. signified

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