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【多选题】
所谓标准齿轮就是齿轮的（）均取标准值。
A.
齿顶高系数和径向间隙系数
B.
节圆半径
C.
压力角
D.
模数
E.
分度圆上的齿厚和齿槽宽相等的齿轮
参考答案：
参考解析：
刷刷题刷刷变学霸
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.