皮皮学，免费搜题
登录
搜题
【简答题】
关系代数的理论基础是（），关系演算的理论基础是（），关系逻辑的理论基础是（）。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Dave asks "Ready to order?" What does he mean?
A.
He has their food ready.
B.
He will take their order now.
C.
He is ready to close the Rock.
【单选题】win the competition, she devoted herself to getting ready for it.
A.
So as to
B.
In order that
C.
In order to
D.
So that
【简答题】求下列各公式的主析取范式和主合取范式: 1 、(P→Q) ∧ R
【单选题】听力原文：Are you ready to order now, or do you need more time to decide? (A) I' II be ready to go out in ten minutes. (B) Actually, could you recommend some dishes? (C) Yes, she will be back soon. (31)
A.
B.
【简答题】求下列各公式的主析取范式和主合取范式: P → Q 。
【单选题】--Are you ready to order now? ______________________
A.
Yes, I’d like a beef steak.
B.
It’s too expensive.
C.
It’s my favourte.
D.
Yes, I want to order.
【单选题】Is the food in fast food restaurants always ready before the customers order it?
A.
Yes，it is．
B.
N0，it is seldom ready．
C.
Yes，it is cooked to order．
D.
N0，not always，but usually．
【简答题】求下列各公式的主析取范式和主合取范式: ( 「 P → Q) ∧ (R ∨ P) 。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
