A.Dry chemical or foam
B.Foam or soda acid
C.carbon dioxide or foam
D.carbon dioxide or dry chemical
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A.Have
B.Has
C.There is
D.There are
A.The rusting area
B.The rusted area
C.The corroded area
D.The corrosive area
A.At
B.On
C.Of
D.In
A.To
B.Against
C.For
D.With
A.No
B.N.R
C.N.P
D.N/R
最新試題
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