A.response.setCharacterEncoding("GBK") B.response.setHeader("Content-type","text/html;charset=GBK") C.response.setContentType("text/html;charset=GBK") D.request.setCharacterEncoding("GBK")
A.一对一 B.一对多 C.多对多 D.零对零
A.主键(PRIMARYKEY)约束 B.非空(NOTNULL)约束 C.外键(FOREIGHKEY)约束 D.默认(DEFAULT)约束