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单选题 双弓模式下,远离主控端主断闭合

A. In double pantograph mode, the main circuit-breaker which far from the operation cab is connected

B. In the automatic mode, the pantograph which far from the operation cab is raised

C. There are two working modes of auxiliary compressor: manual blow and automatic blow

学科：默认课程

时间：2025-12-24 02:53:31

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题目3
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题目4
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题目6
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