单选题 用保险丝给螺栓螺帽打保险可以用单股和双股保险丝,他们的使用情况如何

A、 在电气系统中相距比较近的小紧固件打保险时可以用单股打保险
B、 在电气系统中相距比较近的小紧固件打保险时必需用双股打保险
C、 单股保险拉紧方向与连接件拧紧方向相同,双股保险拉紧方向与连接件拧紧方向相反
D、 通常情况下用单股保险
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