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【单选题】

变速箱中的滑移齿轮,一般应选用( )。

A.
直齿圆柱齿轮
B.
斜齿圆柱齿轮
C.
人字齿圆柱齿轮
D.
直齿锥齿轮
题目标签:变速箱齿轮滑移
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举一反三

【单选题】Passage 3 Questions 11 to 15 are based on the following passage: Scientists in India have invented a new way to produce electricity. Their invention does not get its power from oil, coal or other fuel...

A.
Because bullocks have long been used by Indian people
B.
Because bullocks walk slowly and are easy to control.
C.
Because there are few non-working bullocks in India
D.
Because there is not enough oil in India.