(来学网)明挖爆破时,起爆信号是()。
  • A.
    (来学网)鸣30s、停、鸣30s、停、鸣30s
  • B.
    (来学网)鸣20s、鸣10s、停、鸣20s、鸣10s、停、鸣20s、鸣10s
  • C.
    (来学网)鸣10s、停、鸣10s、停、鸣10s
  • D.
    (来学网)鸣60s
正确答案:
C
答案解析:
起爆信号:准备信号10min后发出,连续三短声,即鸣10s、停、鸣10s、停、鸣10s。
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