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【单选题】
下列断路器中灭弧能力最强的是?A.
少油断路器
B.
多油断路器
C.
六氟化硫气体断路器
D.
真空断路器
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皮皮学刷刷变学霸
举一反三
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【单选题】[音频] Listen and answer: What is the man phoning about?
A.
He is calling about a fair.
B.
He is calling about a hair.
C.
He is calling about a job.
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【单选题】What relationship are between
A.
constitutional isomers
B.
enantiomers
C.
diastereomers
D.
the same molecule
【简答题】Please listen to the dialogue and take notes for the telephone message. Mr. __________ is calling. He is calling the Room ____________. He will call Mr. ___________________again at about 20:00 this ev...
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