挑战习题
1/6单选题
难度:

1.在人们的生产和生活中,经常要对物质进行分类. 下面已将现有物品分成了两类:①铅笔芯、铝质易拉罐、水银 ②橡皮擦、塑料笔套、玻璃板. 这两类物品分别属于(  )
A 导体和绝缘体
B 金属和非金属
C 磁性材料和非磁性材料
D 晶体和非晶体
提示1:
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正确答案:QQ==
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