题目内容：
一般原油中的平均含碳量为多少？（）A．A.33%~42%B.65%~71%C.83%~87%D.40%~45%
参考答案：
单选：一般原油中的平均含碳量为多少？（）A．A.33%~42%B.65%~71%C.83%~87%D.40%~45%
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- 题目类型：单选
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A．A.33%~42%B.65%~71%C.83%~87%D.40%~45%
A．A.33%~42%B.65%~71%C.83%~87%D.40%~45%
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