皮皮学，免费搜题
登录
搜题
【简答题】
根据下表回答问题: (1)如果想知道总共有多少个学生,该用哪个函数?该如何书写? (2)如果想知道按平均分排名占第几, 该用哪个函数? 该如何书写 ?如何快速求出其他同学的平均分排名?
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】在关系模式R(U,F)中,如果X→Y,YÍ X,则称函数依赖X→Y为( )。
A.
非平凡函数依赖
B.
部分函数依赖
C.
平凡函数依赖
D.
传递函数依赖
查看完整题目与答案
【简答题】在关系模式R(U，F)中，如果X→U，则X是R的() A侯选键 B超键 C主键 D外键
查看完整题目与答案
【单选题】—Have you thought of the topic for the composition? — Not yet．I _____ it very carefully, but I haven’t decided．
A.
will consider
B.
have been considering
C.
had considered
D.
was considering
查看完整题目与答案
【单选题】听力原文：M: Where have you been? I thought I was going to have to take the plane without you. W: I'm sorry, I thought we were going to meet in front of the check-in. Fortunately I thought of coming to the...
A.
On the railway platform.
B.
Near the departure gate.
C.
In front of the check-in.
D.
On board the plane.
查看完整题目与答案
【单选题】霍兰德职业兴趣有( )种类型
A.
6
B.
7
C.
8
D.
3
查看完整题目与答案
【单选题】在关系模式R(U,F)中。如果X→Y,如果不存在X的真子集X1,使X1→Y成立,则函数依赖X→Y为
A.
部分函数依赖
B.
完全函数依赖
C.
传递函数依赖
D.
平凡函数依赖
查看完整题目与答案
【单选题】霍兰德职业兴趣有( )种类型
A.
6
B.
5
C.
4
D.
3
查看完整题目与答案
【单选题】西方一些学者根据公司管理结构的演变及其在国外销售额增长情况，将处于不同发展阶段的企业分为【 】
A.
三种类型
B.
四种类型
C.
两种类型
D.
五种类型
查看完整题目与答案
【单选题】Aren’t you tired? I ____ you had done enough for today. A. should have thought B. must have thought C. might have thought D. could have though...
A.
should have thought
B.
must have thought
C.
might have thought
D.
could have thought
查看完整题目与答案
【单选题】霍兰德职业兴趣理论类型有几种1.2
A.
5种
B.
6种
C.
7种
D.
8种
查看完整题目与答案
相关题目：
【单选题】在关系模式R(U,F)中,如果X→Y,YÍ X,则称函数依赖X→Y为( )。
A.
非平凡函数依赖
B.
部分函数依赖
C.
平凡函数依赖
D.
传递函数依赖
查看完整题目与答案
【简答题】在关系模式R(U，F)中，如果X→U，则X是R的() A侯选键 B超键 C主键 D外键
查看完整题目与答案
【单选题】—Have you thought of the topic for the composition? — Not yet．I _____ it very carefully, but I haven’t decided．
A.
will consider
B.
have been considering
C.
had considered
D.
was considering
查看完整题目与答案
【单选题】听力原文：M: Where have you been? I thought I was going to have to take the plane without you. W: I'm sorry, I thought we were going to meet in front of the check-in. Fortunately I thought of coming to the...
A.
On the railway platform.
B.
Near the departure gate.
C.
In front of the check-in.
D.
On board the plane.
查看完整题目与答案
【单选题】霍兰德职业兴趣有( )种类型
A.
6
B.
7
C.
8
D.
3
查看完整题目与答案
【单选题】在关系模式R(U,F)中。如果X→Y,如果不存在X的真子集X1,使X1→Y成立,则函数依赖X→Y为
A.
部分函数依赖
B.
完全函数依赖
C.
传递函数依赖
D.
平凡函数依赖
查看完整题目与答案
【单选题】霍兰德职业兴趣有( )种类型
A.
6
B.
5
C.
4
D.
3
查看完整题目与答案
【单选题】西方一些学者根据公司管理结构的演变及其在国外销售额增长情况，将处于不同发展阶段的企业分为【 】
A.
三种类型
B.
四种类型
C.
两种类型
D.
五种类型
查看完整题目与答案
【单选题】Aren’t you tired? I ____ you had done enough for today. A. should have thought B. must have thought C. might have thought D. could have though...
A.
should have thought
B.
must have thought
C.
might have thought
D.
could have thought
查看完整题目与答案
【单选题】霍兰德职业兴趣理论类型有几种1.2
A.
5种
B.
6种
C.
7种
D.
8种
查看完整题目与答案