在以下语句中，哪些是查询t1表中北京和上海的相关记录（）
A.        select * from t1 where city_name = "北京" or city_name = "上海";
B.        select * from t1 where city_name = "北京" and city_name = "上海";
C.        select * from t1 where city_name in ("北京","上海");
D.        select * from t1 where city_name in "北京" or "上海";

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