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【单选题】

C级剃齿刀用来剃削()级精度齿轮。

A.
A、6
B.
B、7
C.
C、8
题目标签:精度齿轮剃齿刀
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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.