题干

   About ten men in every hundred suffer from color-blindness in some way. Women are luckier: only about one in two hundred is affected on this matter. Perhaps, after all, it is safer to be driven by a woman!

There are different forms of color-blindness. In some cases a man may not be able to see deep red. He may think that red, orange and yellow are all shades of green. Sometimes a person cannot tell the difference between blue and green. In rare cases an unlucky man may see everything in shades of green — a strange world indeed.

Color-blindness in human beings is a strange thing to explain. In a single eye there are millions of very small things called "cones". These help us to see in bright light and to tell the difference between colors. There are also millions of "rods", but these are used for seeing when it is near dark. They show us shapes but no color.

Some insects have favorite colors. Mosquitoes(蚊子) prefer blue to yellow. A red light will not attract insects, but a blue lamp will. In a similar way human beings also have favorite colors. Yet we are lucky.

With the aid of the cones in our eyes we can see many beautiful colors by day, and with the aid of the rods we can see shapes at night. One day we may even learn more about the invisible colors around us.

【小题1】What is the passage mainly about?
A.Colors and their surprising effects.
B.Women being luckier than men.
C.Danger caused by color-blindness.
D.Color-blindness.
【小题2】What can we know about the color-blind?
A.Not all of them have the same problem in recognizing colors.
B.None of them can see deep red.
C.None of them can tell the difference between blue and green.
D.All of them see everything in shades of green.
【小题3】According to the passage, with the help of the cones, we can ______.
A.tell different shapes
B.see in weak light
C.kill mosquitoes
D.tell orange from yellow
【小题4】Which can we use to attract and kill mosquitoes?
A.Red light.
B.Yellow light.
C.Blue light.
D.Green light.
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同类题1

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项。People, like all living things, need food. Food gives us the nutrients our bodies need.【小题1】    .Energy is needed to carry out the life processes.Our bodies cannot use the nutrients or energy in food unless the food is changed. The changing of food into a form the body can use is called digestion.What does digestion do? 【小题2】 Digestion also changes the chemicals of food. It changes large, complex food molecules(微粒)into smaller, simpler ones.【小题3】Digestion takes place in the digestive tract. The digestive tract is a long, winding tube in your body. If stretched out, the digestive tract would be more than 9 meters (30 feet) long.What are the parts of the digestive tract? The parts of the digestive tract are: the mouth, the food pipe , the stomach, the small intestine(肠),and the large intestine.There are many organs along the digestive tracts, such as the liver. 【小题4】The digestive tract and the other digestive organs make up your digestive system.Food enters the body through the mouth. Waste materials (undigested food) leave the body through the anus(肛门).The anus is at the end of the large intestine.Digestion is a step-by-step process.【小题5】 It takes food from one to two days to pass through the entire digestive tract.
A.It also gives us energy.
B.It does not take place quickly.
C.Where does digestion take place?
D.Does the food also give us much strength?
E.Digestion breaks down large pieces of food into smaller pieces.
F.These organs are not part of the digestive tract, but they help in digestion.
G.Although they don't belong to the digestive tract, they help us fight diseases.
 

同类题2

   As the pace of life continues to increase, we are fast losing the art of relaxation. _______ you are in the habit of rushing through life, being on the go(忙碌)from morning till night, it is hard to _______. But relaxation is _______ for a healthy mind and body.

Stress is a(n)_______ part of everyday life and there is no way to _______ it. In fact, it is not the bad thing that it is often supposed to be. A _______ amount of stress is important to provide motivation and give _______ to life. It is only when stress gets out of control that it can lead to poor performance and _______ health.

The amount of stress a person can bear _______ very much on the individual. Some people are not afraid of stress, and such a ________ is obviously chief material for managerial responsibilities. Others lose heart at the ________ of unusual difficulties. When exposed to stress, in whatever form, we ________ both chemically and physically. In fact we make a choice between ________ and fight. And in more ancient days the choices made the ________ between life and death. The crises we meet today are ________ to be so extreme, but however little the stress, it requires the same response. It is when such a reaction ________ long, through continued exposure to stress, that health becomes ________. Such serious conditions as high blood pressure and heart disease have ________ links with stress. Since we cannot ________ stress from our lives we need to find ways to ________ it.

So what do you think of stress? What is your way to deal with it?

【小题1】
A.IfB.UnlessC.OnceD.Until
【小题2】
A.slow downB.calm downC.break downD.turn down
【小题3】
A.effectiveB.satisfyingC.normalD.vital
【小题4】
A.physicalB.naturalC.beneficialD.necessary
【小题5】
A.tolerateB.reduceC.avoidD.overcome
【小题6】
A.stableB.certainC.largeD.great
【小题7】
A.purposeB.courageC.influenceD.instruction
【小题8】
A.illB.excellentC.strongD.weak
【小题9】
A.insistsB.dependsC.callsD.bases
【小题10】
A.patternB.conditionC.situationD.character
【小题11】
A.costB.viewC.sightD.end
【小题12】
A.reflectB.reactC.behaveD.conduct
【小题13】
A.peaceB.fearC.pressureD.failure
【小题14】
A.decisionB.promiseC.differenceD.connection
【小题15】
A.unlikelyB.unableC.supposedD.probable
【小题16】
A.continuesB.livesC.standsD.lasts
【小题17】
A.balancedB.affectedC.endangeredD.controlled
【小题18】
A.establishedB.achievedC.combinedD.realized
【小题19】
A.chooseB.removeC.forbidD.separate
【小题20】
A.deal withB.point outC.look intoD.take down

同类题3

语法填空

EQ is a way of 【小题1】(measure) how a person recognizes emotions in himself or herself and others , and makes these emotional states work better as a group or team. IQ is a value that 【小题2】(indicate) a person's ability to learn, understand, and apply information and skills in a meaningful way. The major 【小题3】(differ)between EQ and IQ is what part of a person's mental abilities they measure; understanding emotions or understanding information.

According to some 【小题4】(theory)of brain function, a high EQ means someone is self-confident ,self-aware, and able to handle difficult emotional experiences. It is often tied directly 【小题5】 the degree of success a person may have in the workplace and in 【小题6】(person)relationships. People with high EQs can often better recognize and control their own emotions, and recognize  emotional states of others 【小题7】(adjust)their behavior accordingly.

A person's IQ, on the other hand, measures concepts like logical reasoning and math skills rather than creative potential or emotional abilities. People with high IQs may be able to learn certain subjects very quickly and make connections between ideas 【小题8】 will be missed by others. They often have great academic success, 【小题9】 they may struggle to find classes that challenge them. The ability to acquire knowledge does not 【小题10】(necessary)mean people can recognize and manage their own emotional states , however.

同类题4

   Experts believe that the best time to teach kids language skills is when they are babies. Most times the task is easily accomplished with parents reading or talking to their babies. However,in some cases that is not possible due to parents' busy work schedules or when kids are born deaf. Now,a blue-eyed robot,a human image,and some high-tech neuroscience may be able to assist parents with this important developmental task.

The Robot AVatar thermal-Enhanced system,or RAVE,is the brainchild of a team of researchers led by Laura-Ann Petitto,an educational neuroscientist. The learning process begins when the robot's camera,which is focused on the baby's face,notices tiny changes in his/her body temperature. This,combined with the baby's facial expression,causes the robot to turn its head and guide the baby's attention to a computer screen,on which a human image starts to communicate with the baby. For example,if the baby points towards the screen,the image might respond,“Are you pointing to me?”and follow that up with a nursery rhyme or fairy tale,all in American Sign Language(ASL). The“conversation”continues until the kid loses interest.

The researchers found that babies as young as 6 to 8 months old began to move their hands in a rhythm similar to ASL after communicating with RAVE for just a few minutes. Petitto says natural language,whether communicated through speech or sign,activates(激活)the same parts of the brain and believes the rhythmic motion proves the babies are learning the essential elements of communication.

What sets this technique apart from other methods,such as showing educational videos or television shows,is its interactive(互动的)nature and real-time response to the baby's actions. The researchers say that while it is too early to determine the system's long-term influence on baby communication, the initial response has been very encouraging. Next, they plan to introduce a robot that can both sign and speak to babies.

【小题1】What can the RAVE system help parents do?
A.Improve babies' health condition.
B.Take good care of babies.
C.Develop babies' language skills.
D.Keep company with babies.
【小题2】What does Paragraph 2 mainly talk about?
A.How babies learn ASL effectively.
B.How parents educate their babies.
C.How robots talk and read to babies.
D.How the RAVE system works.
【小题3】What indicates babies are learning with the help of the RAVE system?
A.Interest in videos and TV shows.
B.Changes in their body temperature.
C.Improvement in their natural language
D.Hand movements in a rhythm like ASL.
【小题4】What do the researchers think of the RAVE system?
A.Promising.B.Impractical.
C.Satisfactory.D.Disappointing.

同类题5

A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.
“It’s extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components (元件),” said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing together the components. “The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own,” he said.
They engineered a series of systems to start and drive the robotic fly. “The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it’s connected to,” said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.
While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers’ fields or on the battlefield. “Basically it should be able to take off, land and fly around,” he said.
Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. “You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead,” he said. “So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis.”
【小题1】The difficulty the team of engineers met with while making the robotic fly was that __________.
A.they had no model in their mind
B.they did not have sufficient time
C.they had no ready-made components
D.they could not assemble the components
【小题2】It can be inferred from paragraphs 3 and 4 that the robotic fly __________.
A.consists of a flight device and a control system
B.can just fly in limited areas at the present time
C.can collect information from many sources
D.has been put into wide application
【小题3】Which of the following can be learned from the passage?
A.The robotic flyer is designed to learn about insects.
B.Animals are not allowed in biological experiments.
C.There used to be few ways to study how insects fly.
D.Wood’s design can replace animals in some experiments.
【小题4】Which of the following might be the best title of the passage?
A.Father of Robotic Fly
B.Inspiration from Engineering Science
C.Robotic Fly Imitates Real Life Insect
D.Harvard Breaks Through in Insect Study