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  3. Together, the United States and Brazil produce more than 70% of the world’s

Together, the United States and Brazil produce more than 70% of the world’s

游客2023-07-16  44
问题     Together, the United States and Brazil produce more than 70% of the world’s alcohol. In the United States, alcohol is produced mostly from corn, and is also【B1】______with a high tax. Brazilian alcohol【B2】______is mainly from sugar cane. In Brazil, about 40% of all motor fuel is alcohol. Many Brazilians drive flex-fuel【B3】______, which can use either gasoline or alcohol. As this【B4】______is so successful, General Motors has stopped making cars for the Brazilian market that only use gasoline. In the United States, vehicles that run on pure alcohol are【B5】______. But most cars can run on a mixture of gasoline and 10% alcohol. Some states require【B6】______alcohol and gas to cut pollution. Yet the use of an important food Crop for fuel has led to【B7】______Alcohol now makes up about 12% of all corn use in the United States. At【B8】______growth rates, that could nearly double by 2015. Some people worry that【B9】______Therefore, fuel researchers are exploring additional ways to make alcohol.【B10】______This material is known as stover. But stover protects against soil loss to wind and water.【B11】______ [br] 【B10】
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答案 One possibility is to use the remains of corn plants left in the field after harvest
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