Pollution regulations require that each sc
问题:
Pollution regulations require that each scupper in an enclosed deck area have a().
A.wooden plug
B.soft rubber plug
C.two-piece soft patch
D.mechanical means of closing
Pollution regulations require that each scupper in an enclosed deck area have a().
A.wooden plug
B.soft rubber plug
C.two-piece soft patch
D.mechanical means of closing