出自:行车设备维修施工管理规定

在关系模式中,实现“关系中不允许出现相同的元组”的约束是()约束。

A、候选键
B、主键
C、键
D、外键
下面题基于学生-课程数据库中的三个基本表:。

A、πsname(σcname=‘MySQL’(s×sc×c))
B、πsname(σcname=‘MySQL’(s∞sc∞c))
C、πsname(σcname=‘MySQL’⊥sc.sno=s.sno⊥sc.cno=c.cno (s×sc×c))
D、πsname(σcname=‘MySQL’⊥sc.sno=s.sno (s×sc×c))
更新数据表中的记录用()。

A、DELETE
B、ALTRE
C、UPDATE
D、SELECT
It has become an important tool with many advantages.

A、这已经成为重要工具,但优势不多。
B、这已经具有很多优势,成为重要工具。
C、这已经成为具有许多优势的重要工具。
_____pity you missed the lecture again!

A、What
B、What a
C、How
Do not think that you are helping others who are not fortunate, but think of it as a/an _______.

A、exchange
B、bargain
C、trade
-Mom, I have got the first prize! -_____________

A、Really? It is not true.
B、Oh, don’t say that.
C、Great! I am so proud of you!
But I have no idea _________ they would like to put up on their walls.

A、that
B、what
C、which
We_ all try our best to do some volunteer work.

A、would
B、could
C、should
My volunteer work helps me _______.

A、grow up
B、check up
C、cheer up
My volunteering at an animal shelter is neither connected to my studies nor to my career interests.

A、我在动物收容所做义工,它既与我的学习无关,也与我的职业兴趣无关。
B、我在动物收容所做义工,它和我的学习无关,和我的职业兴趣有关。
C、我在动物收容所做义工,它和我的学习有关,和我的职业兴趣无关。
A car accident can happen ____ you least expect it.

A、when
B、but
C、otherwise
Why not ______ yourself with other friends together?

A、like
B、enjoy
C、appreciate
-Wow! This is great! -_____________________

A、So do I.
B、Don’t mention it.
C、I agree with you. You are right.
I like the idea _______ we go shopping together.

A、that
B、what
C、which
Baidu is good for Chinese searches, ________ Yahoo is better for searching data in English.

A、when
B、where
C、while
-Thank you for your answer. -_____________________

A、All the same.
B、You’re welcome.
C、Don’t do that.
May 25, 2015 Miss Molly Simpson School of Education, Yale University 38 Hillhouse Avenue New Haven, Connecticut 06511 Dear Molly Simpson, We are pleased to invite you to attend the 14th China International Distance Education Conference to be held on Nov. 25—27, 2015, in Beijing, China. This event will take place at the Conference Center of the Open University of China. The theme of the conference is The Learning Revolution: Making a Breakthrough. As previously discussed, the Organizing Committee is prepared to pay for your round trip air fare and travel expenses from New York to Beijing. In addition, we will provide you with accommodations at the Center for three days including three dinners and incidental expenses during the conference. We look forward to your participation in the conference. If you have any questions about applying for your visa, please contact our International Cooperation Department (icd@ ouchn.edu.cn). Sincerely, Feng Wei Chief Editor, Distance Education in China

1-1、The conference will be held on _______.
A、Oct. 24-26, 2015
B、Nov. 25-27, 2015
C、Dec. 26-28, 2015
____ is the elder brother in the family.

A、She
B、He
C、It
-Next Monday is Teachers’ Day! -_________________

A、I don’t care.
B、You are a teacher.
C、Happy Teachers’ Day.
Volunteering is a great way to get work experience, and may be one of the most valuable experiences of your life. You learn new skills by trying new jobs. Better yet, you can meet people who can give you guidance and possibly help you to find a paid job later on. Employers will be impressed that you took the initiative to learn new things. You can learn how a charitable organization works. Best of all, you will be taking action to promote what you think is important and probably be helping someone else along the way. Instead of considering volunteering as something you do for people who are not as fortunate as yourself, begin to think of it as an exchange. Consider that most people find themselves in need at some point in their lives. You may be the person with the ability to help today, but tomorrow you may be someone who needs others’ help. Even now you might be on both sides of the service cycle: maybe you are a tutor for someone who can.t read, while last month the volunteer ambulance corps rushed you to the emergency room. Volunteering also includes “self-help.” So if you are active in your neighborhood crime watch, your home is protected while you protect your neighbors’ homes, too. It.s a double win: your community or cause benefits from your work and you benefit from your experiences. In a word, adding your effort to the work of others makes everyone.s lives better.

1-1、After you have helped others, you might_____.
A、get guidance from someone else and maybe get a job
B、feel that you’re not as fortunate as others
C、feel that you are special
If you ______ a scientist, in what way would you deal with the problem?

A、were
B、am
C、was
The idea _________ we will have a picnic next week is good.

A、that
B、what
C、which
It was yesterday ____ I finished the job.

A、how
B、that
C、where
In our country every boy and every girl ______ the right to go to school.

A、has
B、have
C、had
Do you hear ________ strange? It is scaring.

A、nothing
B、anything
C、everything
There are more and more crimes ______ a lack of rules and regulations.

A、because
B、because of
C、since
I filled my water bottle and ______.

A、drank it up
B、ate it up
C、ran it up
If you are traveling in the summer, I would _______ Paris or London.

A、recommend
B、recognize
C、refuse
-Hey Peter. _________________ -Sure, it is my pleasure. What is it?

A、Can you do me a favor?
B、What can I do for you?
C、Would you favor it ?
-_______________ - I need to look for some papers to add to my research report.

A、Is the website helpful for your paper?
B、How many papers have you read so far?
C、How is your report?
-I am Paul. Can I have your name? -_________________

A、I am new here.
B、I am 30 years old.
C、My name is Linda.
- How long has your daughter been missing? -_______________

A、I miss my daughter a lot.
B、We haven’t seen each other for two months.
C、About half an hour. I’ve been looking for her everywhere.
-Wow! This is a marvelous room! -_____________________

A、Great! I am very careful.
B、Don’t mention it.
C、Thank you. It really costs me a lot.
People can learn whatever they like anytime and anywhere.

A、人们可以随时随地学习他们想学的任何事物。
B、人们可以学习他们想学的任何事物,比如时间与地点。
C、人们可以学习关于时间与地点的任何事物。
A pedestrian was critically injured in a Westwood area car accident near the corner of Wilshire Boulevard and Veteran Avenue early morning on January 5, 2016. The police said it involved a hit-and-run driver. The car was dark and was last seen traveling east on Ashton Avenue from Veteran Avenue. The investigation is ongoing. It appears that the driver struck and seriously injured the pedestrian, and left the victim lying in the roadway without even stopping to help or call emergency personnel. Outrageous! Leaving the scene of an injury or fatal crash is a serious crime under California law. California Vehicle Code 20001 (a) states: “The driver of a vehicle involved in an accident resulting in injury to a person, other than himself or herself, or in the death of a person shall immediately stop the vehicle at the scene of the accident.” We hope the driver in this case is arrested and brought to justice. If you have any information about the suspect or the vehicle, please visit the Hit-and-Run Reward website at hitandrunreward.com to offer a useful tip and become qualified for a $1,000 reward.

1-1、A pedestrian was dead in the hit-and-run case.
A、T
B、F
My volunteer work helps me grow up. It has made me more aware of the difficulties other people go through and made me appreciate the simple things we have in life. It enables me, as an adult, to become more confident and to realize the difference I can make. I now have new career aspirations and the confidence to take forward these new ideas, since I started mentoring at the Open University and gained the experience of working with young students. I.ll go on to do a teaching assistant course and look for a volunteering teaching or youth work in the future. My research project will be to build a spatial web application. It was inspired by the volunteering I do for another not-for-profit organization. My volunteering at an animal shelter is neither connected to my studies nor to my career interests. I do it purely for pleasure, satisfaction and the feeling that I can help somebody. It.s made me a happier person, and I wouldn.t have got this far at university without it.

1-1、What’s the best title of the passage?
A、My Volunteering Experience
B、My Research Project
C、My Study
After swimming, I went on ________.

A、jogging
B、to jog
C、jog
There ________ two hundred dollars to pay.

A、are
B、is
C、were
He _______ the first prize.

A、was awarded
B、awarded
C、awards
We can act ________ the interview.

A、on
B、as
C、out
_____ is the elder brother in the family.

A、She
B、He
C、It
____ Lily nor I am going to Beijing next year .

A、Both
B、Neither
C、Either
Besides, there are many ____________ there, both historic and modern.

A、places of interest
B、parking places
C、shopping malls
______ our team have got the top prize.

A、With the end
B、By the end
C、To the end
John began to get _____ about the machine since it didn.t work well.

A、worried
B、surprised
C、excited
-How are you? -_________________

A、Fine. Thank you!
B、I am 23 years old.
C、My name is Cathy.