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After the new technique was introduced, the factory produced tractors in 1988 as

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After the new technique was introduced, the factory produced tractors in 1988 as

After the new technique was introduced, the factory produced ________ tractors in 1988 as the year before.

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A.as twice manyB.as many twiceC.twice as manyD.twice many as

试题答案

答案:C