苏州悦美购超市老板?:which of the following materials are composites (more than one)?
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a.cemented carbide
b. phenolic molding compound
c.plywood
d.Portland cement
e.rubber in automobile tires
f.wood
g.1020 steel
b. phenolic molding compound
c.plywood
d.Portland cement
e.rubber in automobile tires
f.wood
g.1020 steel
C D G
C
D
G
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