When coal, the______of plants, is burnt, chemical energy is changed into heat en

游客2025-03-20 7

问题 When coal, the______of plants, is burnt, chemical energy is changed into heat energy.

选项 A、remains
B、remainders
C、traces
D、remnants

答案 A

解析 remains"残余，遗迹"；remainder"剩余物，余数"；trace"痕迹，踪迹"；rem—nant"余下的部分"。句意为："当煤——植物的遗体一一燃烧时，化学能使之转换为热能。"

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