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【单选题】
曲轴正时齿轮一般用( )制造的。
A.
夹布胶木
B.
铸铁
C.
铝合金
D.
中碳钢
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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】液力变矩器工作原理：是在泵轮液体循环流动过程中，固定的（）给涡轮一个反作用力矩，其力矩大小与作用方向都能随涡轮的转速而变化，从而使涡轮输出的转矩大于泵轮输入的转矩。
A.
泵轮
B.
涡轮
C.
导轮
D.
叶轮
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.
【单选题】液力变矩器工作原理：是在泵轮液体循环流动过程中，固定的（）给涡轮一个反作用力矩，其力矩大小与作用方向都能随涡轮的转速而变化，从而使涡轮输出的转矩大于泵轮输入的转矩。
A.
泵轮
B.
涡轮
C.
导轮
D.
叶轮
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