In 19th-century London，（）was the main source of smog._精华吧

In 19th-century London，（）was the main source of smog.

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In 19th-century London，（）was the main source of smog.

A.Burning wood

B.Burning charcoal

C.Burning kerosene

D.Burning coal

正确答案：Burning coal

Tag：能源英语面面观时间：2023-12-21 15:07:26

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