Which of the following materials is a good insulator?( )
A.Steel
B.Aluminum
C.Glass
D.Copper
正确答案：C解析：insulator：绝缘子;aluminum：铝;copper：铜译文：玻璃是一种良好的绝缘体
Whichofthefollowingmaterialsisagoodinsulator?()ASt
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