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【多选题】

滚齿可加工的齿轮类型有___________。

A.
直齿圆柱齿轮
B.
螺旋齿圆柱齿轮
C.
相距较近的多联齿轮
D.
内齿轮
E.
蜗轮
F.
齿轮轴
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题目标签:加工齿轮滚齿
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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】姜黄的产地加工为()

A.
除去粗皮,用清水漂洗,蒸透,低温(60℃)干燥
B.
除去须根,泥土,蒸或煮至透心,晒干
C.
除去茎叶及须根,洗净晒干或微火烘干
D.
除去须根,去净泥土,切片,晒干
E.
洗净,反复暴晒,堆放至七八成干,除去须根,干燥

【单选题】激光加工的危害有:

A.
对眼睛的危害
B.
对皮肤的危害
C.
电气危害
D.
辐射危害