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The most significant uses of coal are in().
The most significant uses of coal are in().
A.steel production
B.liquid fuel
C.electricity generation
D.cement manufacturing
正确答案:steel production;liquid fuel;electricity generation;cement manufacturing
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Which of the following are fossil fuels?
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According to a report by British Petroleum(BP), Large supplies of coal are known to exist(proven reserves) or thought to be available in().