BOTH
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Some common insulators include glass, rubber, plastic, ceramic, and wood. These materials are used to prevent the flow of electricity and heat.
apple apricot
Greengrocer
apple
* Orange
· nectarine
pear, peach
Grapes and plums
Rubber, glass, plastic, ceramic, air, quartz, paper, wood, bakelite, porcelain.
lemon and melon