问题 更新时间2023/4/3 12:59:00 12. Copper as well as most metals _____ of electricity, but wood is a poor one.A. is a good conductor B. are good conductors C. is a good insulator D. are good insulators 答案 登录 注册 A 出自：青书学堂 >> 河北建筑工程学院-建筑工程技术（专科）-大学英语1
问题 更新时间2023/4/3 12:59:00
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