-
What are three common reasons why customers are saying that they need to evolve their datacenter?（）
A . architectures that is inflexible and inefficient
B . desire to use the same vender for desktop and server deployments
C . selecting best-performing vendors for each individual component
D . existing equipment has reached and of life
E . increasing operational costs of managing data centers
F . demand among users for access to information anytime, anywhere
-
Liens may be created by the contract（）they do not exist at common law.
A . where
B . whether
C . there
D . and
-
Which statements are correct regarding indexes？ （）
A . When a table is dropped， the corresponding indexes are automatically dropped.
B . For each DML operation performed， the corresponding indexes are automatically updated.
C . Indexes should be created on columns that are frequently referenced as part of an expression.
D . A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically creates a uniqueindex.
-
Australia.s most common plans are（）
A . oaks and elms
B . palms and pines
C . willows and poplars
D . eucalypts and wattle
-
Although TCP segments differ from UDP segments, they both contain some common fields. What two segments do they share in common?（）
A . source address
B . options
C . sequence number
D . sources
E . destination port
F . checksum
-
Which statements are true regarding listeners（）
A . Listeners use only the TCP/IP protocol.
B . Multiple listener processes can run simultaneously on a host.
C . Multiple database instances can be registered with a single listener.
D . The listener-related errors can be traced only at the administrative level.
E . Only one database instance can be registered with a single listener at any time
-
When a pushing vessel and a vessel being pushed are rigidly connected in a composite unit，they shall be regarded as（）.
A . a tugboat
B . a sailing vessel
C . a power-driven vessel
D . a vessel propelled by machinery and under sail
-
When a pushing vessel and a vessel（）ahead are rigidly connected in a composite unit they shall be regarded as a power-driven vessel.
A . is pushed
B . being pushed
C . was pushed
D . be pushed
-
What are three common reasons why customers are saying that they need to evolve their data center? （）
A . demand among users for access to information anytime, anywhere
B . desire to use the same vender for desktop and server deployments
C . existing equipment has reached and of life
D . increasing operational costs of managing data centers
E . architectures that is inflexible and inefficient
F . selecting best-performing vendors for each individual component
-
Cones are more common at the ______ of the eye whereas rods are more common in the ________.
-
Commonly, the stages of Love are .
-
The fact that Americans address the judge in a court as Your Honor shows ________. A. their Old World heritage B. they are common people C. they are afraid of the judge D. their respectability
-
原文:物体在水中比在空气中轻,这是一个大家共有经验。译文:It is a of common experience that are in water than they are in air.
-
BJTs are commonly used as （ ）.
-
原文:物体在水中比在空气中轻,这是一个大家共有经验。译文:It is a of common experience that are in water than they are in air.第一空：matter；第二空： bodies；第三空： lighter
-
Since 1970, millions of enthusiasts ______ a substance which they believe can remedy the common cold — VitaminC
A．have taken
B．have been taking
C．have been taken
D．have being taken
-
Less commonly, they make mistakes with tragic （consequences).（)
A．sequence
B．concern
C．influences
D．results
-
There are different ways in which people try to deal with the problem of energy. One way is the greater production of common energy sources, such as coal, oil and gas. The trouble with these sources, however, is that they are not renewable.
Another way is energy conservation (节能 ), which means using energy more efficiently (有效地 ). In some very cold countries people build special houses to save energy. They place materials between the inside and the outside of the walls of the house to keep the cold out and the warmth in. The house is heated by the lights, the body heat of the people and the other equipment in it.
Finally, renewable energy sources are used even though they are often expensive to develop. One form. of these is geothermal energy. In certain parts of the world the temperature of the earth increases thirty degrees centigrade with each kilometer down. At six kilometers, therefore, it rises to nearly two hundred degrees. To get the heat, water is pumped (压;抽 ) down into the rocks and back up to the surface. Heat from the earth is already used in certain countries.
1、How many ways of dealing with the energy problem are discussed in the text？ ()
A、Two.
B、Three.
C、Four.
D、Five.
2、From the text we learn that coal().
A、is quite easy to produce
B、is not used most efficiently
C、is the most common source of energy
D、could be renewed only by new technology
3、The writer tells about the "special houses" because they().
A、show the excellent skills of the builders
B、serve as an example of energy conservation
C、are heated by different sources of energy
D、are warmer than other types of houses
4、The underlined words "geothermal energy" in the third paragraph mean ().
A、renewable source
B、 underground source
C、 heat inside the earth
D、 temperature of the earth
5、At a place where the surface temperature is 15°C, how deep do you have to dig so as to get a temperature of 75 °C ？ ()
A、One km.
B、 Two km.
C、 Three km.
D、 Four km
-
Common stockholders get a fixed dividend and they are entitled to it before preferred stockholders receive any dividend.
A．True
B．False
-
In computing, passwords are commonly used to limit access to official users. Yet the widespread use of passwords has serious drawbacks. Office workers now have to remember an average of twelve system passwords. In theory they should use different passwords for each site, but in reality these would be impossible to remember, so many people use the same password for all.
An additional problem is that the majority use simple words such as "hello", or names of family members, instead of more secure combinations of numbers and letters, such as 6ANV76Y. This permits computer hackers to download dictionaries and quickly find the word that allows them access.
When system users forget their passwords there is extra expense in supplying new ones, while if people are forced to change passwords frequently they often write them down, making systems even less secure. Therefore, it is clear that the idea of passwords, which have been used as security devices for thousands of years, may need rethinking.
One possible alternative has been developed by the American firm Real User, and is called "passfaces". In order to access the system a worker has to select a series of photographs of faces from a randomly (随机地) generated sequence. If the pictures are selected in the correct order, access is granted. This concept depends on the human ability to recognize and remember a huge number of different faces, and the advantage is that such a sequence cannot be told to anyone or written down, so is more secure. It is claimed that the picture sequence, which used photographs of university students, is easier to remember than passwords, and it has now been adopted for the United States Senate.
What is the disadvantage of passwords as mentioned in Paragraph 1？
A．They do not ensure security.
B．They are difficult to remember.
C．They have to be changed frequently.
D．They limit computer accessibility.
-
common laws are laws which have been established through common practice in the courts. ()
-
The twins have（) interests, but they have one thing in common: they both are avid sta
The twins have() interests, but they have one thing in common: they both are avid stamp cllectors.
A.diverse
B.diversitying
C.aversified
D.dversity
-
Since Tom and Paul are partners, they need to_______ every issue concerning their common interests.
A.take back
B.talk back
C.take over
D.talk over
-
They are brothers, but they have nothing _____ common.
A．in
B．on
C．with
D．for
