（）are offered by metal matrices than those offered by their plastic counterparts.
A.higher strength
B.fracture toughness
C.stiffness
D.elastic
正确答案：higher strength；fracture toughness；stiffness
（）are offered by metal matrices than those offered by their plastic counterparts.
5次阅读
In order to improve（）at the interface, the surface of the（）must be treated.
The matrix is the binder material that（）the fibers.
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