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。

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。
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