外研版（三起）（2012）小学英语五年级下册Module 2 Unit 2 Mr Li was a teacher.Module 2 Unit 2 Mr Li was a teacher.课件(2)

外研版（三起）（2012）小学英语五年级下册Module 2 Unit 2 Mr Li was a teacher.Module 2 Unit 2 Mr Li was a teacher.教案

外研版（三起）（2012）小学英语五年级下册Module 2 Unit 2 Mr Li was a teacher.Module 2 Unit 2 Mr Li was a teacher.教案(5)

外研版（三起）（2012）小学英语五年级下册Module 2 Unit 2 Mr Li was a teacher.Module 2 Unit 2 Mr Li was a teacher.教案(3)

外研版（三起）（2012）小学英语五年级下册Module 2 Unit 2 Mr Li was a teacher.Module 2 Unit 2 Mr Li was a teacher.教案(1)

外研版（三起）（2012）小学英语五年级下册Module 2 Unit 2 Mr Li was a teacher.Module 2 Unit 2 Mr Li was a teacher.习题

外研版（三起）（2012）小学英语五年级下册Module 2 Unit 2 Mr Li was a teacher.Module 2 Unit 2 Mr Li was a teacher.习题(2)

外研版（三起）（2012）小学英语五年级下册Module 2 Unit 2 Mr Li was a teacher.Module 2 Unit 2 Mr Li was a teacher.习题(1)

查询课程信息,根据用户需要修改某些元组的 TEACHER字段 EXEC SQL BEGIN DECLARE SECTION /*说明宿主变量dept, deptname,Hcno, CName, TEacher,New Teacher * EXEC SQL END DECLARE SECTION gets(dept); deptname=)” strcat(deptname, dept) strcat(deptname, 1%1)

1.已知前提:(1)如果x与y是同班同学,则x的老师也是y的老师;(2)小李和小 张是同班同学;(3)王先生是小李的老师,运用自然演绎推理证明:王先生也是小张 的老师 证明:首先定义谓词: Teacher(x, y) x是y的老师 Classmates(x, y) x和y是同班同学 则已知的前提可以符号化为 (1)VxVyV=Teacher(x, y)A Classmates (, =)>Teacher(x, =))