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1. 
The properties of plastics depend on their...
A.
Composition
B.
Number of monomers
C.
Color
D.
Additives
2. 
All plastics are ductile and...
A.
malleable
B.
brittle
C.
recyclable
D.
thermal conductors
3. 
The majority of plastics are...
A.
good electrical, thermal and acoustic insulators
B.
recyclable
C.
light
D.
porous
4. 
The majority of plastics are...
A.
good electrical, thermal and acoustic conductors
B.
renewable
C.
impermeable
D.
resistant
5. 
The majority of plastics are...
A.
elastic
B.
flexible
C.
ductile
D.
low density materials