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According to IPCC, what can make up the shortfall of the oil and gas reserves？
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In the last paragraph, what does the word "switch" stand for？
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 thing 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 screen, but the mouse is still our workhorse.
The computer mouse was invented in 1964 by Douglas Englehart of Stanford University. As computer screens became popular and arrow keys were used to more 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.
How does the mouse work？ We have to start at the bottom, so think upside down for now. It all starts with 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 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.
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 the 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.
Taiwan's authoritarian and repressive regime was for decades a mirror image of that of the main- land, but over the last 20 years both have taken enormous steps, with Taiwan leading the charge, to- ward opening up their markets, economies and the societies. Taiwan is a highly successful tiger economy, accounting for more than 10 percent of the world's production of information-technology components.
With both China and Taiwan members of the World Trade Organization, the European Commission rightly opened a European Trade and Economic office almost 12 months ago in Taipei. There is no doubt that the European Union should continue to develop industrial and economic links with Tai- wan and that the EU should also welcome the emerging multiparty democracy and respect for human rights on the island. But this should not blind Europe to the wider economic and political picture in Asia.
China will and should be one of the engines of the world economy in this century. In 2003 the Chinese economy, with its 1.3 billion people, grew at nearly 10 percent, and this is believed to be a conservative estimate. By contrast, the European Central Bank last June predicted the eurozone's growth at 1.1 to 2.1 percent for 2004. China's manufacturing sector grew by 17 percent last year when most of the European manufacturing sector seemed to be in decline. It is in all of our interests that this growth continues and that a solid EU-China partnership is developed. This prospect will be endangered only if China is provoked into an arms race with its neighbors.
One way of ratcheting up the tension would be to call into doubt the one China principle that the EU has supported for so long. Those supporting Taiwan's independence threaten to do exactly that. Yes, the EU should ensure Taiwan is not forced into any shotgun marriage with China, but equally, we should not encourage a destabilization of the status quo. The 23 million Taiwanese should be looking toward an accommodation with China, rather than using interests within the United States and EU to promote an agenda that would threaten us all.
This passage may be______.
Part A
Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D . Mark your answers on ANSWER SHEET 1.
On the past few days, two nations with large numbers of AIDS-infected people have announced plans to distribute a triple cocktail of life-prolonging antiretroviral drugs free to all who need it. China has been treating 5,000 patients and plans to expand the program to cover everyone in the country. South Africa's cabinet approved a plan that includes drugs for all who need them.
China spent years denying it had an AIDS problem. Until recently, South Africa's top officials minimized the epidemic, questioned whether H. I. V. was the cause of AIDS and labeled antiretroviral drugs "poisons". Both countries have now taken a courageous and essential step.
But only one is likely to succeed. Indeed, China's program is already failing. One in five Chinese who have received antiretroviral drugs has already stopped taking them, which can lead to the creation of drug-resistant strains of the virus. China has only about 100 doctors nationwide with experience in treating AIDS. Health workers are simply handing patient's bottles of pills. Most patients receive no counseling on how to take them or deal with their side effects, and little follow-up monitoring. China is also still determined to crack down on high-risk groups such as prostitutes and drug users, which drives the epidemic underground. Even recently, provincial police were beating AIDS patients protesting for treatment. Treating AIDS requires a network of health care workers and a political climate that does not stigmatize and discriminate against those who come forward.
South Africa's government, by contrast, understands that handing out pills is only part of the solution. The program, which will cost about ＄ 680 million a year by 2007, will spend only a third of its budget on buying drugs. Much of the money will go instead to establishing clinics and training thousands of doctors, nurses, counselors and other workers to staff them. The government plans to have a well-run clinic in every district by the end of the year, and in every municipality by the end of 2008.
South Africa has an influential national network of campaigners for AIDS treatment whose pres- sure and advice were crucial to devising the plan, and who will be crucial to its success. It also had help from the foundation led by former President Bill Clinton, which negotiated better prices for AIDS medicine. China's government, by contrast, made its decisions in secret and has yet to permit such widespread citizen activism on AIDS. But China has one huge advantage over South Africa: while one in nine South Africans has the AIDS virus, China's epidemic is far smaller. Now that China has decided to treat AIDS, it has a chance to learn from other nations before the deluge.
The author write this passage mainly to______.
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