Copper as well as most metals______.

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问题 Copper as well as most metals______.

选项 A、is a good conductor
B、is a good insulator
C、are good conductors
D、are good insulators

答案A

解析 as well as在此并不是表示与主语并列关系，该句主语仅仅是copper。因此，选项A是正确的(conductor导体，insulator绝缘体)。

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