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How does the Cisco Security Agent proactively stop both known and unknown attacks？（）
A . It reverse engineers and documents the attack
B . It looks subjectively at network traffic for abnormal flows of behavior
C . It creates a signature and updates the network security policies
D . It actively monitors all vulnerable areas of the network
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A customer with a well-known brand wants to make sure they have a Green decision in their next IT infrastructure investment. How can IBM Cool Blue help this customer？ （）
A . Providing tools to plan， monitor， manage， and reduce power consumption.
B . Reducing cooling requirements by running CPUs at lower speeds.
C . Using smart system design to create high-power servers.
D . Adapting existing solutions like the Rear Door eXpander.
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Since many insects have already become（）to DDT, scientists have to look for some new insecticide
A、active
B、resistant
C、tough
D、gradual
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Scientists have to _______ past experiences in making new ideas.
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The article says scientists know how one-legged flamingos stand.
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According to the passage, scientists have discovered that influenza viruses_____.
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Have scientists found of water on Mars?
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32 Scientists study how photosynthesis works because they want to_____.
A improve the efficiency of it.
B turn plant sugars to a new form. of energy.
C get more sugars and starches from plants.
D make green plants a new source of energy.
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听力原文： Scientists say sharks have lived in the world's oceans for millions of years. Scientists say there are more than 350 different kinds of sharks.
Sharks do not have bones, and a shark has an extremely good sense of smell. It can find. small amounts of substances in the water, such as blood, body liquids and chemicals produced by animals. Sharks also sense electrical and magnetic power linked to nerves and muscles of living animals. These powerful senses help them find their fond. Some sharks will eat just about anything. Many unusual things have been found in the stomachs of some large sharks. They include shoes, dogs, a cow's foot and metal protective clothing.
About forty percent of the different kinds of sharks lay eggs. The others give birth to live young. Some sharks carry their young inside their bodies like humans do.
Scientists are beginning to understand the importance of sharks to humans. Medical researchers want to learn more about the shark's body defense system against disease. They know that sharks recover quickly from injuries. Sharks appear never to suffer infections, cancer or heart diseases.
What is this passage mainly about？
A．The necessity of protecting sharks.
B．The living environment of sharks.
C．The dangers of sharks to human beings.
D．An introduction to sharks.
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Scientists are pushing known technologies to their limits in an attempt to ________mo
A．A.extract
B．B.inject
C．C.discharge
D．D.drain
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___ recently ___ scientists known something about AIDS.
A．Not until…have
B．Until…did
C．Not until…do
D．Until…have
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Scientists have discovered a genetic defect that a...
Scientists have discovered a genetic defect that appears to cause deficit-hyperactivity disorder, more commonly known as hyperactivity. People afflicted with this disorder have trouble focusing their attention and controlling impulses, and tend to be rest-less and aggressive. The defect occurs in a gene that regulates the body's use of the thyroid hormone. This finding was made in continuing study organized by the National Institute of Diabetes and Digestive and Kidney Diseases in which 70 percent of children inheriting the gene were hyperactive while only 20 percent of the children not inheriting the gene were hyperactive. And although the researchers admit that this defective gene probably accounts for only a fraction of cases of hyperactivity, this discovery will allow doctors to spot newborn babies likely to have the disorder, and also to provide clues for its cause and treatment.
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【C1】______ nearly a hundred years of powered flight, scientists are still trying to figure out how birds fly.
Researchers have learned that the slapping noise pigeons make when they suddenly take off is the sound of super charged lift. They call it the "clap fling" effect.
Here at SRI International scientists try to duplicate the pigeons' thrust. A flashing strobe reveals the secret.
Scott Stanford, a scientist at SRI, says, You re looking at the clap fling effect, where the two wings will come together and peel apart 【C2】______ each other, thus augmenting lift 【C3】______ drawing air from the top to the bottom. "
This mechanical bug won't get off the ground. 【C4】______ its flapping wings demonstrate a potential propulsion system for robotic birds: man-made rubbery muscle.
Roy Kornbluh works at SRI. "There, I'm turning the voltage on and off, and you can see when the voltage is on, the material is larger 【C5】______ when the voltage is off."
Super computers show high-speed airflows over supersonic aircraft.
But scientists have only begun to see how air flows 【C6】______ really low speeds.
Professor Max Platzer of the Naval Postgraduate School, says, "The flapping wing is generating a thrust, this way, this is the basic physics of the phenomenon."
It's pelicans--not pigeons--the Navy is looking at. The Navy is looking at the smooth easy flight of pelicans low over water--called "ground effect." Researchers at the Naval Postgraduate School are trying to imitate the pelican's efficiency.
Assistant Professor Kevin Jones of the Naval Postgraduate School says, " 【C7】______ flapping the wings, symmetrically, we're 【C8】______ effect imitating ground effect. We now have the same feature a bird sees when it's flying, over a ground plane."
An electric motor drives the flapping wings. Researchers here are working 【C9】______ ways to beam power to the tiny bird.
David Jenn of the Naval Postgraduate School says, "There's no battery inside of here, so we're going to set this inside the radar beam, and the energy is extracted from the radar beam and will be used to propel the motor."
Scientists are learning it's one thing to build an airplane, 【C10】______ quite another to build a bird.
【C1】______
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Scientists have discovered a close_____between smoking and several serious diseases.
A．action
B．connection
C．union
D．function
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Within ten years scientists will probably have___________.
A．the nucleus of a cell
B．cloned human beings
C．a human being in two years
D．a law to ban human cloning
E．a report on hunman cloning
F．heavy media coverage
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Scientists put forward that Northern Europe would have __________ if climate continues, while Britain would have warmer weather。
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_____ your timely advice,I would never have known how to go about the work.1994
A．Unless
B．But for
C．Exceptfor
D．Not for
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听力原文： Cosmetic surgery, also known as "plastic" surgery, is the science of changing the way a person looks by reshaping a part of the body. The science of beauty has changed with time, but the desire for beauty remains the same. Today I am going to talk about how the changes of fashion have led to the new modem age of cosmetic surgery.
In the 1700s, height and weight became an important part of beauty. During the time of the French Revolution, many women used to wear corsets, belts that made their waists appear much slimmer. In England in the 1500s, makeup became an important part of beauty. Some women used to paint their .face white. They thought this made them more attractive. Later, in North America, some women used to eat arsenic, a dangerous poison, to make their faces whiter. By the 1860s, American women started using makeup to make themselves more charming. In the 1890s, Americans discovered that bicycle tiding could actually improve their appearance! They exercised in order to look and feel better. The popularity of bicycle riding even led to a change in fashion. American women began to wear shorter skirts instead of the. traditional long, full ones.
Although diet and exercise are still popular ways of improving one's appearance, there are some parts of the body that cannot change without the help of a cosmetic surgeon. In the past, American women used to spend weeks repeating words that started with the "P" because they wanted to change the shape of their mouths. Today a cosmetic surgeon can reshape the nose or lips in a few hours. Rhinoplasty, the reshaping of nose, can greatly improve a person's image.
Surprisingly, cosmetic surgery has been used for centuries in China and India. Today it is used in many countries to improve the outlook of people who have been hurt in fires or in car accidents It is also used to improve the appearance of children who are born with physical problem.
Questions:
15.What is the topic of the lecture？
16.What did women in North America do to improve their appearance in 1890s？
17.What do you think is the speaker's attitude towards rhinoplasty？
18.Which statement is NOT true according to the lecture？
(35)
A．Why people will take plastic surgery.
B．How cosmetics develop in its long history.
C．How the change of fashion led to the development of cosmetic surgery.
D．How people from all over the world make themselves look better.
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Scientists have found various kinds of methods to solve the problem of global warming.
A．Y
B．N
C．NG
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Scientists have many theories about how the universe _____ into being.
A cameB was comingC had comeD would come
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Many scientists have been probingpsychological problems（）
A．solving
B．exploring
C．settling
D．handling
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Passage 1Its one of our common beliefs that mice are afraid of cats. Scientists have long known that even if a mouse has never seen a cat before, it is still able to detect chemical signals released f
A、 mice s inborn terror of cats
B、 the evolution of Toxoplasma
C、 a new study about the effects of a parasite on mice
D、 a harmful parasite called Toxoplasma gondii
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请阅读Passage l。完成第21—25小题。Passage 1Its one of our common beliefs that mice are afraid of cats. Scientists have long known that even if a mouse has never seen a cat before, it is still able to detect che
A、Toxoplasma gondii causes people strange and deadly diseases.
B、With certain infection the infectious disease cannot be cured completely.
C、Human beings infected by toxoplasma gondii will have permanent brain damage.
D、Toxoplasma gondii is harmful to human beings, but it does no harm to mice.
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The plan which scientists are now developing___ a process known as “transforming” Mars.
A．involving
B．involves
C．involved
D．involve
