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【单选题】
齿轮传动中为增加接触面积,改善啮合质量,在保留原齿轮传动副的情况下,采用( )措施。A.
刮削
B.
研磨
C.
锉削
D.
加载跑和
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反馈参考答案：
举一反三
【简答题】桥面构造包括哪些内容?
【单选题】_____, living in big cities is more convenient because of the complete facilities provided.
A.
In all
B.
All in all
【单选题】Complete the following sentences with proper prepositions or adverbs. Are there any living things __________ the planet Mars?
A.
in
B.
on
C.
at
D.
out
【判断题】Is this a complete sentence? Then I put the backpack on the living room sofa.
A.
正确
B.
错误
【简答题】Are they content _____ living at home, or are they living at home merely for _________(convenient) and waiting for the moment when they can be _________ (complete) independent?
【简答题】A．Absence of illness. B．A long life. C．Good conditions of living. D．Complete satisfaction with life.
【单选题】Please choose the appropriate word to complete the sentence below. Living in cities has a smaller impact on the environment than living in ___________ and rural areas.
A.
suburbs
B.
urban
C.
growth
D.
concentration
【判断题】Is this a complete sentence? Hopped out of the backpack and began jumping around the living room floor.
A.
正确
B.
错误
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