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单选题
A few years ago, computers were used only in business, in medicine, and for scientific research, ______ these days they are common in almost all schools.
A
though
B
whereas
C
so
D
therefore
参考答案
参考解析
解析：
几年前计算机仅仅应用在商业、医药和科学研究领域，然而现在它们几乎在所有的学校都非常普遍。whereas连接的是两个并列分句，表示现在和过去的对比。
几年前计算机仅仅应用在商业、医药和科学研究领域，然而现在它们几乎在所有的学校都非常普遍。whereas连接的是两个并列分句，表示现在和过去的对比。
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单选题You want to track and store all transactional changes to a table over its lifetime. To accomplish this task， you enabled Flashback Data Archive with the retention of 5 years. After some time， the business requirement changed and you were asked to change the retention from 5 years to 3 years. To accomplish this， you issued the following command： ALTER FLASHBACK ARCHIVE fla1 MODIFY RETENTION 3 YEAR； What is the implication of this command？（）A
The command produces an error because the retention time cannot be reduced.B
All historical data is retained but the subsequent flashback data archives are maintained for only three years.C
All historical data is purged and the new flashback data archives are maintained for three years.D
All historical data older than three years is purged from the flashback archive FLA1.
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单选题Research Is a State of Mind
For many years there has been much misunderstanding as to just what research is. The popular conception seems to be that there is something mysterious about it， and before any research can be done it is necessary to have expensive scientific apparatus and large， elaborately equipped laboratories. Actually， this is not so. （6） It is a simple， organized way of trying to accomplish something you wish to do—so simple that anyone can do research anywhere at any time.
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8.（）A
Makesurethegameisworththecandle.B
Thatisastepintherightdirection，butIdon'tbelieveitisenough.C
Youtaketheeasyobstaclesfirstandbyaprocessofeliminationyoueventuallyarriveattheoneortwomajorones.D
Butinselectingtheproblem，youneedtobesuretoanalyzeitcarefullytoseethatitisworththeeffort.E
Researchisn'taphysicalthingatall；it'sastateofmind.F
Bycontrast，allresearchworkis99.9percentfailureand，ifwesucceedonce，wearein.
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单选题There were many people present and he appeared only for a few seconds, so I only caught a （）of him.A
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单选题Research Is a State of Mind
For many years there has been much misunderstanding as to just what research is. The popular conception seems to be that there is something mysterious about it， and before any research can be done it is necessary to have expensive scientific apparatus and large， elaborately equipped laboratories. Actually， this is not so. （6） It is a simple， organized way of trying to accomplish something you wish to do—so simple that anyone can do research anywhere at any time.
First， you select the problem you would like to solve， then you list at least ten reasons why it has not been solved. （7） It takes just as much effort to solve a useless problem as a useful one. （8）
After carefully—and I want to emphasize that word “carefully”—selecting the problem and the ten things between you and the solution， you then use the same procedure as in solving a crossword puzzle.（9）In the solution of the remaining obstacles you may need some simple apparatus， but the things you will probably need most are infinite patience and persistence. Few people realize the difficulties of doing any new thing.
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6.（）A
Make sure the game is worth the candle.B
That is a step in the right direction， but I don't believe it is enough.C
You take the easy obstacles first and by a process of elimination you eventually arrive at the one or two major ones.D
But in selecting the problem， you need to be sure to analyze it carefully to see that it is worth the effort.E
Research isn't a physical thing at all； it's a state of mind.F
By contrast， all research work is 99. 9 per cent failure and， if we succeed once， we are in.
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单选题You need to design a method to ensure that research intellectual property remains confidential. You solution must meet security requirements. What should you do？（）A
Require client computers to connect to research intellectual property through a SSL VPNB
Place SFSQL1 and ATLSQL1 on a separate virtual LAN from the internal network. Grant access to these virtual LAN segments to only the client computers that are used by authorized usersC
Require that communications between SFSQL1， SFFP1， ATLSQL1， and ATLFP1 use IPSecD
Create a separate subnet for all servers that contain research intellectual property
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单选题A few years ago, computers were used only in business, in medicine, and for scientific research, ______ these days they are common in almost all schools.A
though B
whereasC
so D
therefore
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单选题______ a cinema at the corner in King Street but it closed a few days ago.A
It used to haveB
There used to haveC
It used to beD
There used to be
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单选题The village used to be small, and had only a few streets. There were only three shops: ______ and the General Store.A
the butchers’, the bakers’B
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单选题A few years ago, computers were used only in business, in medicine, and for scientific research, _____ these days they are common in almost all schools.A
thoughB
whereasC
soD
therefore
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