单项选择题

The value of a particular variety of clay for pottery is related to its mineralogical and chemical makeup.

A．reactions
B．attraction
C．charts
D．composition
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单项选择题
The shrapnel maimed the young soldier.
A．endangered
B．slanted
C．crippled
D．embarrassed
单项选择题
Materials such as clay, wax, glass, and rubber are widely used in industry today because they are malleable.
A．easy to manufacture
B．readily available
C．pliable
D．buoyant
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