Thesignalsthatwillbeusedforemergencyshouldbeclearly（）（列出）. A: putout B: setout C: seton D: puton
Thesignalsthatwillbeusedforemergencyshouldbeclearly（）（列出）. A: putout B: setout C: seton D: puton
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Thesignalsthatwillbeusedforemergencyshouldbeclearly（）（列出）. A: putout B: setout C: seton D: puton