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【单选题】

对于同步齿轮带不正确的是()

A.
兼有链传动的优点
B.
传动比准确
C.
轴上压力小
D.
制造安装要求较低
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题目标签:同步齿轮齿轮
参考答案:
参考解析:
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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.

【单选题】对于同步齿轮带不正确的是()

A.
兼有链传动的优点
B.
传动比准确
C.
轴上压力小
D.
制造安装要求较低

【多选题】开式齿轮的主要失效形式是__。

A.
轮齿折断
B.
齿面磨损
C.
齿面胶合
D.
齿面点蚀