该句逗号是否使用正确:Oneofthemainchallengesencounteredbytherefiningindustryworldwide,isthedeteriorationinfeeds
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该句逗号是否使用正确:Oneofthemainchallengesencounteredbytherefiningindustryworldwide,isthedeteriorationinfeedstockqualityandtheintroductionofheavycrudeoils.
A.正确
B.错误
参考答案: