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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】GMC-96x钢轨打磨车传动轴每行驶1500km应进行一次（）补充，以保证十字轴与滚针轴承，花键套与花键轴等摩擦副的润滑。
A.
2#锂基润滑脂
B.
3#锂基润滑脂
C.
6#传动油
D.
9#传动油