A: I have a light breakfast early in the morning.B:().A. So have IB. Me tooC. So am I
A: I have a light breakfast early in the morning.
B:().
A. So have I
B. Me too
C. So am I
A: I have a light breakfast early in the morning.
B:().
A. So have I
B. Me too
C. So am I
请根据短文内容,回答题。
New Research Lights the Way to Super-fast Computers
(1) New research published today in the journal Nature Communications, has demonstrated how glass can be manipulated to create a material that will allow computers to transfer information using light. This development could significantly increase computer processing speeds and power in the future.<br>
(2)The research by the University of Surrey, in collaboration with the University of Cambridge and the University of Southampton, has found it is possible to change the electronic properties of amorphous chalcogenides, a glass material integral to data technologies such as CDs and DVDs.<br>
By using a technique called ion doping, the team of researchers have discovered a material that could use light to bring together different computing functions into one component, leading to all-optical systems.<br>
(3)Computers currently use electrons to transfer information and process applications. On the other hand, data sources such as the Internet rely on optical systems; the transfer of information using light. Optical fibers are used to send information around the world at the speed of light, but these signals then have to be converted to electrical signals once they reach a computer, causing a significant slowdown in processing.<br>
(4) "The challenge is to find a single material that can effectively use and control light to carry information arotmd a computer. Much like how the web uses light to deliver information, we want to use light to both deliver and process computer data," said project leader, Dr Richard Curry of the University of Surrey.<br>
(5) "This has eluded researchers for decades, but now we have now shown how a widely used glass can be manipulated to conduct negative electrons, as well as positive charges, creating what are known as &39;pn-junction&39; devices. This should enable the material to act as a light source, a light guide and a light detector -- something that can carry and interpret optical information. In doing so, this could transform. the computers of tomorrow, allowing them to effectively process information at much faster speeds."<br>
(6) The researchers expect that the results of this research will be integrated into computers within ten years. In the short term, the glass is already being developed and used in next-generation computer memory technology known as CRAM, which may ultimately be integrated with the advances reported.<
Paragraph 2 __________ 查看材料
A.Expectation of the discovery
B.The problem of current computers
C.A new finding
D.The purpose of the research
E.Public reaction to the discovery
F.The use of the new material
请根据短文的内容,回答题。
Making Light of Sleep
All we have a clock located inside our brains. Similar to your bedside alarm clock, your intemal clock runs on a 24-hour cycle.-This cycle, called a circadian rhythm, helps control when you wake,when you eat and when you sleep.<br>
Somewhere around puberty, something happens in the timing of the biological clock. The clock pushes forward, so adolescents and teenagers are unable to fall asleep as early as they used to. When your mother tells you it&39;s time for bed, your body may be pushing you to stay up for several hours more.<br>
And the light coming from your computer screen or TV could be pushing you to stay up even later.<br>
This shift is natural for teenagers. But staying up very late and sleeping late can get your body&39;s clock out of sync with the cycle of light and dark. It can also make it hard to get out of bed in the morning and may bring other problems, too. Teenagers are put in a kind of a gray cloud when they don&39;t get enough sleep, says Mary Carskadon, a sleep researcher at BrownUniversity. It affects their mood and their ability to think and learn.<br>
But just like your alarm clock, your internal clock can be reset. In fact, it automatically resets itself every day. How? By using the light it gets through your eyes. Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal clocks. For years,researchers thought that the signals that synchronize the body&39;s clock were handled through the same pathways that we use to see.<br>
But recent discoveries show that the human eye has two separate light-sensing systems. One system allows us to see. The second system tells our body whether it&39;s day or night.
The clock located inside our brains is similar to our bedside alarm clock because __________. 查看材料
A.it controls when we wake, when we eat and when we sleep
B.it has a cycle of 24 hours
C.it is a cycle also called circadian rhythm
D.it can alarm any time during 24 hours
请根据短文的内容,回答题。
Weaving with Light
In the Sierra Madre mountain range of west central Mexico, the native Huichol people live much the way their ancestors did--without electricity. That&39;s because it&39;s too expensive to string power lines to the remote mountain areas where they live. To help support themselves, the Huichol create beautiful artwork. They sell their art in cities hundreds of miles away from their villages.<br>
And without electricity--at home or on the road, they can only work during daylight hours. When it gets dark, they must stop whatever they&39;re doing.<br>
Now, a team of scientists, designers, and architects is using new technologies to provide the Huichol with light after the sun sets. The scientists&39; technique involves weaving tiny electronic crystals into fabrics that can be made into clothes, bags, or other items.<br>
By collecting the sun&39;s energy during the day, these lightweight fabrics provide bright white light at night. Their inventors have named the fabrics "Portable (轻便的) Lights". Portable Lights have the potential to transform. the lives of people without electricity around the world.<br>
At the core of Portable Lights technology are devices called high-brightness light-emitting diodes (高亮度法光二极管), or HB LEDs. These tiny lights appear in digital clocks, televisions,and streetlights.<br>
LEDs are completely different from the light bulbs(灯泡). Most of those glass bulbs belong to a type called incandescent lights (白炽灯). Inside, electricity heats a metal coil (线圈) to about2,200 degrees Celsius. At that temperature, bulbs give off light we can see. Ninety percent of energy produced by incandescent lights, however, is heat--and invisible. With all that wasted energy, bulbs burn out quickly. They are also easily broken.<br>
LEDs, on the other hand, are like tiny pieces of rock made up of molecules (分子) that are arranged in a crystal structure. When an electric current passes through a LED, the crystal structure produces light. Unlike incandescent bulbs, they can produce light of various colors. Within a LED,the type of molecules and their particular arrangement determine what color is produced.
The Huichol don‘t use electricity because __________. 查看材料
A.it is too difficult for them to change their lifestyle
B.they know nothing about it
C.it costs too much to string power lines
D.they don"t need it
请根据短文的内容,回答题。
Computer Mouse
The basic computer mouse is an amazingly clever invention with a relatively simple design that allows us to point at things on the computer and it is very productive. Think of all the things you can do with a mouse like selecting text for copying and pasting, drawing, and even scrolling on the page with the newer mice with the wheel. Most of us use the computer mouse daily without stopping to think how it works until it gets dirty and we have to learn how to clean it. We learn to point at things before we learn to speak, so the mouse is a very natural pointing device. Other computer pointing devices include light pens, graphics tablets and touch screens, but the mouse is still our workhorse.<br>
The computer mouse was invented in 1964 by Douglas Engle hart of Stanford University. As computer screens became more popular and arrow keys were used to move around a body of text, it became clear that a pointing device that allowed easier motion through the text and even selection of text would be very useful. The introduction of the mouse, with the Apple Lisa computer in 1983,really started the computer public on the road to relying on the mouse for routine computer tasks.<br>
How does the mouse work? We have to start at the bottom, so think upside down for now. It all starts with the mouse ball. As the mouse ball in the bottom of the mouse rolls over the mouse pad, it presses against and turns two shafts. The shafts are connected to wheels with several small holes in them. The wheels have a pair of small electronic light-emitting devices called light-emitting diodes (LED) mounted on either side. One LED sends a light beam to the LED on the other side. As the wheels spin and a hole rotates by, the light beam gets through to the LED on the other side. But a moment later the light beam is blocked until the next hole is in place. The LED detects a changing pattern of light, converts the pattern into an electronic signal, and sends the signal to the computer through wires in a cable that goes out of the mouse body. This cable is the tail that helps give the mouse its name. The computer interprets the signal to tell it where to position the cursor on the computer screen.<br>
So far we have only discussed the basic computer mouse that most of you probably have or have used. One problem with this design is that the mouse gets dirty as the ball rolls over the surface and picks up dirt. Eventually you have to clean your mouse. The newer optical mice avoid this problem by having no moving parts.
Most computer users want to know how the computer mouse works. 查看材料
A.Right
B.Wrong
C.Not mentioned
() the light of what you have told me, I will say that it is he who came here yesterday.
A、By
B、In
C、Of
D、Under
A.of, light
B.for, big
C.like, small
D.of, heavy
A.shallow
B.sound
C.light
D.broken
______your recommendation, I have decided to emigrate America.
A.In case of
B.Acting on
C.In case
D.In light of
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