该句逗号是否使用正确:Oneofthemainchallengesencounteredbytherefiningindustryworldwide,isthedeteriorationinfeedstockqualityandtheintroductionofheavycrudeoils.


该句逗号是否使用正确:Oneofthemainchallengesencounteredbytherefiningindustryworldwide,isthedeteriorationinfeedstockqualityandtheintroductionofheavycrudeoils.

A.正确

B.错误

正确答案:错误


Tag:中英文科技论文写作 逗号 时间:2022-01-06 15:35:56