第1题:
A SELECT statement can be used to perform these three functions:1. Choose rows from a table.2. Choose columns from a table3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities? ()
A. difference, projection, join
B. selection, projection, join
C. selection, intersection, join
D. intersection, projection, join
E. difference, projection, product
第2题:
Accordiiig to the passage, which of the following is NOT true? ( )
A. Some Americans would not accept the value of conservation and environment protection, because this value would probably make them unemployed.
B. Many Americans have been used to wasting, so it will be difficult for them to accept the new value of conservation.
C. Some old values are still having a strong influence on American people, although they are harmful in this new age.
D. Most Americans have fully realized the need to protect the environment, so they have taken measures to recycle junked goods.
第3题:
A.application layer
B.session layer
C.transport layer
D.network layer
E.datalink layer
F.physical layer
第4题:
第5题:
第6题:
Which of these is the best way to convince a prospect of the benefits of the S-Series?()
第7题:
At which layers of the OSI model do WANs operate (Choose two.)()。
第8题:
第9题:
Having them work out the rul
Having them give some explamples.
Having them explain the meanin
Having them explain the structure!
第10题:
difference, projection, join
selection, projection, join
selection, intersection, join
intersection, projection, join
difference, projection, product
第11题:
They are encouraged to do maintenance for the training centre.
Most of them get paid for their work.
They have to cook their own meals.
They can choose to do community work.
第12题:
第13题:
Questions 61-65 are based on Passage Two:
Passage Two
As the 21st century begins, a number of leaders in politics, education, and other professions believe that the US must adopt some new values to go along with the old traditional ones. What new values should Americans adopt? This is a very difficult question to answer. Certainly, a greater value should be placed on the conservation of natural reasources; Americans should learn to use less and waste less. But conservation has never been a strong value to Americans, who have believed that their country offered an endless,abundant supply of natural resources.
Recently, progress has been made-more and more Americans are recycling their paper, cans,bottles,and other goods-but old wasteful habits died hard. Furthermore,the need to protect the environment may conflict with the need for jobs,as in the Northwest ,where conservationists battle lumber companies that want to cut down ancient redwood trees. A belief in the value of conservation is still compared with other American values; it can become stronger only as Americans see the need for it more clearly.
In addition,Americans may need to place a strong value on cooperation on a national scale to achieve important national objectives. The American idea of the national good has never been based on national cooperation but rather on the freedom of the individual, maintaining those conditions that provide the greatest freedom and prosperity for the individual .
It is far more difficult for Americans to accept shared sacrifice for the common good and wellbeing of the entire country. For example ,although the majority of Americans believe that it is extremely important to balance the national budget and reduce the deficit, they do not want to see cuts in government programs that benefit them personaliy.
The American value of competition also hinders the development of a spirit of national cooperation. Competition sometimes encourages feelings of suspicion rather than the mutual trust that is necessary for successful national cooperation. Although Americans often cooperate successfully on the local level-in neighborhood groups and churches, for example, on the national level, they may see themselves as part of an interest group that is competing with other interest groups for government funds. A request by the national government for shared sacrifice may be seen as coercive and destructive rather than voluntary and constructive. However, the demands for the 21st century may compel Americans to place a greater value on national cooperation to solve problems that affect them all, directly and indirectly.
The best TITLE of this passage could be ( ).
A. Which is Better, New Value or Old Value?
B. Conservation vs. Need for Jobs
C. The Need for New National Values
D. Cooperation and Competition
第14题:
题库
1. What extracurricular activities were you involved in? What made you choose those? Which of them did you most enjoy, and why?
第15题:
第16题:
第17题:
第18题:
A SELECT statement can be used to perform these three functions: 1. Choose rows from a table. 2. Choose columns from a table 3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities?()
第19题:
more than twice
as twice many
twice as many
more than twice as many
第20题:
第21题:
Channel 1.
Channel 2.
Both of them.
第22题:
802.11x
802.11a
802.11n
802.11g
第23题:
People choose different destinations depending on different interests.
People interested in history can have fun in Colonial Williamsburg.
All the people take vacations only to do nothing but relax themselves.
Not all Americans can afford time and money to go on a vacation.