问题
选择题
—What can you see in the picture?
—I can see a farm. And there _____ a lot of animals on it. [ ]
A. is
B. are
C. be
D. am
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—What can you see in the picture?
—I can see a farm. And there _____ a lot of animals on it. [ ]
A. is
B. are
C. be
D. am
答案：B
| 题中假定学生关系是S(S#,SN.,SEX,AGE)，课程关系是C(C#,CNAME,TEACH-ER)，学生选课关系是SC(S#,C#,GRADE)。 |
检索所有比“王华”年龄大的学生的姓名、年龄和性别，正确的SELECT语句是______。
A．SELECT SN,AGE,SEX FROM SSHERE AGE＞(SELECT AGE FROM SWHERE SN=’王华’)
B．SELECT SN,AGE,SEXFROM SWHERE SN=’王华’
C．SELECT SN,ACE,SEX FROM SWHERE AGE＞(SELECT ACEWHERE SN=’王华’)
D．SELECT SN,ACE,SEX FROM SWHERE ACE＞王华 AGE