【单选题】【消耗次数：1】
汽车安全气囊系统（SRS）与座椅安全带收紧系统（SRTS）的点火时序为：
①
SRS与SRTS同时点火
②
SRS先点火
③
SRTS先点火
参考答案：
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同时点火方式指[填空]气缸共用一个点火线圈
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