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【单选题】
螺旋齿轮是（）接触
A.
线
B.
面
C.
点
D.
齿面
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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.
【多选题】间接接触防护的措施有（）。
A.
自动切断电源
B.
不接地的局部等电位联结保护
C.
电气分隔
D.
等效的绝缘
相关题目：
【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.
【多选题】间接接触防护的措施有（）。
A.
自动切断电源
B.
不接地的局部等电位联结保护
C.
电气分隔
D.
等效的绝缘
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