海盗Geek

解法一:SELECT TNAME,DEPART FROM TEACHER A LEFT JOIN COURSE B USING(TNO) WHERE ISNUL (B.tno); 解法二:select tname,depart from teacher a where not exists (sel

2009年全国硕士研究生入学统一考试 英语试题 　　大作文是：网络的近与远 　　一 客观描述图 　　二 说明意思 　　三 给出观点 　　【范文】 　　As is vividly depicted in the drawing, in front of computers and in narrow