皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【单选题】
在下列关系运算中,不改变关系表中的属性个数但能减少元祖个数的是
A.
并
B.
笛卡尔积
C.
投影
D.
交
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【简答题】II. 用介词填空。 1. She called the police ___________help. 2. There aere many shops close___________ my school. 3. Our English teache r lives ___________Zhongshan Road. 4. The post office is ___________ th...
查看完整题目与答案
【简答题】根据所给首字母提示或汉语意思完成句子。 1. They p_______ soccer yesterday. 2. We like our English teacher, because he is very f_______ to us. 3. How about _______ (游泳) at the pool in the park? 4. Tom's father has a _____...
查看完整题目与答案
【单选题】当蜗杆传动传递功率较大时,为提高传动效率,一般采用Z1=( )。
A.
1
B.
2～3
C.
3～4
D.
4
查看完整题目与答案
【单选题】Mr Qin is_________
A.
Mr Smith's teacher
B.
Mrs Smith's teacher
C.
English
D.
a teacher of English
查看完整题目与答案
【单选题】Mom, let me ________(介绍) my English teache Miss Su to you.
A.
introduce
B.
introduction
C.
interest
查看完整题目与答案
【单选题】_____ to train his daughter in English，he put an ad like this in the paper，“______，an English teacher for a ten－year－old girl.”
A.
Determined；Wanted
B.
Determined；Wanting
C.
Determine；Wanted
D.
Determining；Wanting
查看完整题目与答案
【简答题】根据实际情况回答问题。 1. What do you play? _ __                                           _ 2. Do you like English? 3. Who is your English teacher? 4. What colour do you like?
查看完整题目与答案
【简答题】完形填空。 I am a person who can get angry easily. But since I read an article from my English teacher, things 1 a lot. I am 2 at a boarding (寄宿的) school, so I 3 learn not only how to study well, but also ...
查看完整题目与答案
【单选题】19大在哪里召开?
A.
西安
B.
北京
C.
上海
D.
福州
查看完整题目与答案
【简答题】阅读理解。 Mr White and Mr Miller work in the same school. Mr White teaches English. Mr Miller teaches math. They are in the same office.  One day, Mr White says to Mr Miller, 'I want to have a party at ho...
查看完整题目与答案
相关题目：
【简答题】II. 用介词填空。 1. She called the police ___________help. 2. There aere many shops close___________ my school. 3. Our English teache r lives ___________Zhongshan Road. 4. The post office is ___________ th...
查看完整题目与答案
【简答题】根据所给首字母提示或汉语意思完成句子。 1. They p_______ soccer yesterday. 2. We like our English teacher, because he is very f_______ to us. 3. How about _______ (游泳) at the pool in the park? 4. Tom's father has a _____...
查看完整题目与答案
【单选题】当蜗杆传动传递功率较大时,为提高传动效率,一般采用Z1=( )。
A.
1
B.
2～3
C.
3～4
D.
4
查看完整题目与答案
【单选题】Mr Qin is_________
A.
Mr Smith's teacher
B.
Mrs Smith's teacher
C.
English
D.
a teacher of English
查看完整题目与答案
【单选题】Mom, let me ________(介绍) my English teache Miss Su to you.
A.
introduce
B.
introduction
C.
interest
查看完整题目与答案
【单选题】_____ to train his daughter in English，he put an ad like this in the paper，“______，an English teacher for a ten－year－old girl.”
A.
Determined；Wanted
B.
Determined；Wanting
C.
Determine；Wanted
D.
Determining；Wanting
查看完整题目与答案
【简答题】根据实际情况回答问题。 1. What do you play? _ __                                           _ 2. Do you like English? 3. Who is your English teacher? 4. What colour do you like?
查看完整题目与答案
【简答题】完形填空。 I am a person who can get angry easily. But since I read an article from my English teacher, things 1 a lot. I am 2 at a boarding (寄宿的) school, so I 3 learn not only how to study well, but also ...
查看完整题目与答案
【单选题】19大在哪里召开?
A.
西安
B.
北京
C.
上海
D.
福州
查看完整题目与答案
【简答题】阅读理解。 Mr White and Mr Miller work in the same school. Mr White teaches English. Mr Miller teaches math. They are in the same office.  One day, Mr White says to Mr Miller, 'I want to have a party at ho...
查看完整题目与答案
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题