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【多选题】
下列关于定义主键的叙述,正确的有
A.
主键是表中能唯一标识一条记录的一个字段或者多个字段的组合
B.
只有定义了主键,与数据库其他表建立关系
C.
可以在建立表结构时定义主键
D.
在建立表结构之后,就不能再定义主键了
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【简答题】Translate the following sentences into Chinese.(将下列句子翻译成中文) 1. You have to work hard if you want to succeed in your courses. 2. I managed to pass the final exam with a fairly good grade. 3. Shortly af...
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【简答题】江苏东台市新农镇临海村青年农民崔益祥从邻乡农民邓瑞云土法上楼板导致楼房倒塌一死三伤的重大事故中得到启示：中国有2.2亿个家庭在农村，如果有厂家专为农村建筑开发一个起吊安装楼板的自动化设备，将有一个了不起的市场空间。有了这样的想法，崔益祥筹资10万元开发费，在南京建工学院专家教授指导下顺利开发成功全自动楼板吊装机，这种由手扶拖拉机、发电机、卷扬机、自动伸缩塔、空中平面输送轨道、电控箱等组合而成的成套...
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【简答题】从B栏中选出A 栏的答语。 A (     ) 1. May I go shopping? (     ) 2. If you work hard in school, you may go with us. (     ) 3. When do you leave for America? (     ) 4. How far is it from China to Canada? (     ...
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【简答题】G eometric figures are widely used in various aspects of people ’ s life, such as patterns on sweaters, shapes of desks and even the shape of a birthday cake. In addition, geometric figures can be see...
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【多选题】Fill in the blanks with the proper words given below, changing the form if necessary.(请用下列单词的正确形式填空) comfortably; instruction; apologize; residence; available; accommodation; service; additional; inco...
A.
accommodation
B.
entrance
C.
residence
D.
services
E.
instruction
F.
additional
G.
apologize
H.
inconvenience
I.
comfortably
J.
available
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【单选题】Watch the video clip. Put the following statements in the correct order accordingto the video clip.
A.
We released our finest creation — the Macintosh.
B.
Pixar created the world’s first computer animated feature film, Toy Story .
C.
We started Apple.
D.
I fell in love with an amazing woman.
E.
Apple bought NeXT and I returned to Apple.
F.
I started a company named NeXT.
G.
Laurene and I have a wonderful family together.
H.
I turned 30 and got fired.
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【简答题】词形变换。 1. If you work hard, you'll___________(success) in the exams. 2. Thank you very much for giving us some___________(value) advice. 3. One of my__________(hobby) is to collect stamps. 4. You must ...
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【简答题】案例:江苏东台市新农镇临海青年农民崔益祥从邻乡农民邓瑞云土法上楼板导致楼房倒塌一死三伤的重大事故中得到启示:中国有2.2亿个家庭在农村,如果有厂家专为农村建筑开发一个起吊安装楼板的自动化设备,将有一个了不起的市场空间。 有了这样的想法,崔益祥筹资10万元开发费,在南京建工学院专家教授指导下顺利开发成功全自动楼板吊装机,这种由手扶拖拉机,发电机,卷扬机,自动伸缩塔,空中平面输送轨道,电控箱等组合而成...
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【简答题】She will be here in an hour to you. 2. The cookies are thickly with chocolate. 3. Cheap imported goods are the market. 4. He received a of grateful telegrams and letters. 5. She has a very temperature...
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【简答题】Readin g C omprehension Directions: In this part, there are two passages followed by questions or unfinished state ments, each wi th f our suggested answers marked A, B, C, and D . Choose the one th a...
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【简答题】江苏东台市新农镇临海村青年农民崔益祥从邻乡农民邓瑞云土法上楼板导致楼房倒塌一死三伤的重大事故中得到启示：中国有2.2亿个家庭在农村，如果有厂家专为农村建筑开发一个起吊安装楼板的自动化设备，将有一个了不起的市场空间。有了这样的想法，崔益祥筹资10万元开发费，在南京建工学院专家教授指导下顺利开发成功全自动楼板吊装机，这种由手扶拖拉机、发电机、卷扬机、自动伸缩塔、空中平面输送轨道、电控箱等组合而成的成套...
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【简答题】从B栏中选出A 栏的答语。 A (     ) 1. May I go shopping? (     ) 2. If you work hard in school, you may go with us. (     ) 3. When do you leave for America? (     ) 4. How far is it from China to Canada? (     ...
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【简答题】G eometric figures are widely used in various aspects of people ’ s life, such as patterns on sweaters, shapes of desks and even the shape of a birthday cake. In addition, geometric figures can be see...
查看完整题目与答案
【多选题】Fill in the blanks with the proper words given below, changing the form if necessary.(请用下列单词的正确形式填空) comfortably; instruction; apologize; residence; available; accommodation; service; additional; inco...
A.
accommodation
B.
entrance
C.
residence
D.
services
E.
instruction
F.
additional
G.
apologize
H.
inconvenience
I.
comfortably
J.
available
查看完整题目与答案
【单选题】Watch the video clip. Put the following statements in the correct order accordingto the video clip.
A.
We released our finest creation — the Macintosh.
B.
Pixar created the world’s first computer animated feature film, Toy Story .
C.
We started Apple.
D.
I fell in love with an amazing woman.
E.
Apple bought NeXT and I returned to Apple.
F.
I started a company named NeXT.
G.
Laurene and I have a wonderful family together.
H.
I turned 30 and got fired.
查看完整题目与答案
【简答题】词形变换。 1. If you work hard, you'll___________(success) in the exams. 2. Thank you very much for giving us some___________(value) advice. 3. One of my__________(hobby) is to collect stamps. 4. You must ...
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