【25】A．formulasB．marksC．symbolsD．signals

What is NOT a distress signal （).

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Which is NOT a distress signal （).A.A continuous sounding with any fog signal apparatusB.A

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____，the bus started at once.A、The signal was givenB、The signal givingC、The signal give

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【C2】A．reasonB．noticeC．warningD．signal

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_____________ 查看材料A.meansB.marksC.saysD.indicates

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材料题请点击右侧查看材料问题 查看材料A.digitsB.marksC.i

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56._________A. digitsB. marksC. imagesD. pictures

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