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(末考:基础知识部分)当数据库表中的某个字段的内容不允许重复时,我们则可以为该字段添加( )约束。【请填写三个中文汉字】
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举一反三
【多选题】以下社会关系中属于民法调整对象的是( )。
A.
国家向企业征税
B.
国家机关购买办公楼
C.
国家授予公民甲以“全国劳动模范”的荣誉称号
D.
夫妻双方因感情不和离婚
查看完整题目与答案
【单选题】下列哪一项属于明代“小憩”时的卧具
A.
月洞床
B.
架子床
C.
拔步床
D.
罗汉床
查看完整题目与答案
【单选题】听力原文：M: Would you like to go with me to a movie tonight, or do you have to work at the restaurant? W: I should study for my sociology class, but I could be talked out of it. Q: What does the woman imp...
A.
She's willing to go to the movie.
B.
She has to go to sociology class tonight.
C.
She'll stay home to study tonight.
D.
The man should meet her at the restaurant.
查看完整题目与答案
【单选题】在固定资产系统中每月可以进行多少次计提本月折旧操作
A.
只能做一次
B.
只能做两次
C.
次数无限制
D.
在选项中可以控制计提折旧的次
查看完整题目与答案
【单选题】听力原文：W: Can you come to the concert with me this weekend or do you have to prepare for exams? M: I still have a lot to do... but maybe a break would do me good. Q: What will the man probable do? (17)
A.
Stay home to prepare for his exam.
B.
Go to the concert with the woman.
C.
Attend the concert after the exam.
D.
Ask the woman to study with him.
查看完整题目与答案
【单选题】在固定资产系统中每月可以进行多少次计提本月折旧操作
A.
只能做一次
B.
只能做两次
C.
次数无限制
D.
在选项中可以控制计提折旧的次数
查看完整题目与答案
【单选题】下列哪一项属于明代 “ 小憩 ” 时的卧具
A.
罗汉床
B.
拔步床
C.
月洞床
D.
架子床
查看完整题目与答案
【单选题】If you'd like to see the doctor tomorrow, what do you have to do beforehand?
A.
You have to keep an appointment.
B.
You have to schedule an appointment.
C.
You have to cancel an appointment.
D.
You have to miss an appointment.
查看完整题目与答案
【单选题】听力原文：M: Can you come to the concert with me this weekend, or do you have to prepare the exams next week? W: Frankly speaking, I still have a lot to do for the exams, but maybe a break would do me good...
A.
Stay home to prepare for the exams.
B.
Attend the concert next week after the exams are over.
C.
Take a coffee break.
D.
Go to the concert with the man.
查看完整题目与答案
【单选题】一Do you have to go to bed before 10? 一Yes, I _________. [     ]
A.
have
B.
have to
C.
do
D.
don't
查看完整题目与答案
相关题目：
【多选题】以下社会关系中属于民法调整对象的是( )。
A.
国家向企业征税
B.
国家机关购买办公楼
C.
国家授予公民甲以“全国劳动模范”的荣誉称号
D.
夫妻双方因感情不和离婚
查看完整题目与答案
【单选题】下列哪一项属于明代“小憩”时的卧具
A.
月洞床
B.
架子床
C.
拔步床
D.
罗汉床
查看完整题目与答案
【单选题】听力原文：M: Would you like to go with me to a movie tonight, or do you have to work at the restaurant? W: I should study for my sociology class, but I could be talked out of it. Q: What does the woman imp...
A.
She's willing to go to the movie.
B.
She has to go to sociology class tonight.
C.
She'll stay home to study tonight.
D.
The man should meet her at the restaurant.
查看完整题目与答案
【单选题】在固定资产系统中每月可以进行多少次计提本月折旧操作
A.
只能做一次
B.
只能做两次
C.
次数无限制
D.
在选项中可以控制计提折旧的次
查看完整题目与答案
【单选题】听力原文：W: Can you come to the concert with me this weekend or do you have to prepare for exams? M: I still have a lot to do... but maybe a break would do me good. Q: What will the man probable do? (17)
A.
Stay home to prepare for his exam.
B.
Go to the concert with the woman.
C.
Attend the concert after the exam.
D.
Ask the woman to study with him.
查看完整题目与答案
【单选题】在固定资产系统中每月可以进行多少次计提本月折旧操作
A.
只能做一次
B.
只能做两次
C.
次数无限制
D.
在选项中可以控制计提折旧的次数
查看完整题目与答案
【单选题】下列哪一项属于明代 “ 小憩 ” 时的卧具
A.
罗汉床
B.
拔步床
C.
月洞床
D.
架子床
查看完整题目与答案
【单选题】If you'd like to see the doctor tomorrow, what do you have to do beforehand?
A.
You have to keep an appointment.
B.
You have to schedule an appointment.
C.
You have to cancel an appointment.
D.
You have to miss an appointment.
查看完整题目与答案
【单选题】听力原文：M: Can you come to the concert with me this weekend, or do you have to prepare the exams next week? W: Frankly speaking, I still have a lot to do for the exams, but maybe a break would do me good...
A.
Stay home to prepare for the exams.
B.
Attend the concert next week after the exams are over.
C.
Take a coffee break.
D.
Go to the concert with the man.
查看完整题目与答案
【单选题】一Do you have to go to bed before 10? 一Yes, I _________. [     ]
A.
have
B.
have to
C.
do
D.
don't
查看完整题目与答案