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BookStore数据库中有出版社表Publisher(PublisherCode, Publisher, Telephone)
A.
SQL语句中,WHERE PublisherCode IN ('21', '31')子句等价于________。
B.
PublisherCode= '21' OR PublisherCode='31'
D.
PublisherCode= '21' AND PublisherCode='31'
E.
PublisherCode<='31' AND PublisherCode>='21'