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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】斜齿轮接触强度计算中的重合度系数Zε考虑了重合度对单位齿宽载荷的影响，它__________。
A.
与端面重合度和纵向重合度有关
B.
只与端面重合度有关
C.
只与纵向重合度有关
D.