Passage Two Fire can help people in many ways. But it can also be very dangerous. Fire can heat (加热) water, warm houses, give light and cook food. But fire can burn things, too. It can burn trees, houses, animals, or people. Sometimes big fires can burn forests. Nobody knows for’ sure how people began to use fire. But there are many interesting old stories about the first time a man or a woman started a fire. One story from Australia tells about a man very, very long time ago. He went up to the sun by a rope (绳子) and brought fire down. Today people know how to make a fire with matches (火柴). Children sometimes like to play with them. But matches can be very dangerous. One match can burn a piece of paper, and then it might burn a house.. A small fire can become a big fire very fast. Fires kill many people every year. So you must be careful with matches. You should also learn to put out (熄灭) fires. Fires need oxygen (氧气). Without oxygen they will die. There is oxygen in
A. must be careful
B. should keep air away from it
C. must know it is dangerous
D. should cover it with water only
In many ways, today’s business environment has changed qualitatively since the late 1980s. The end of the Cold War radically altered the very nature of the world’s politics and economics. In just a few short years, globalization has started a variety of trends with profound consequences: the opening of markets, true global competition, widespread deregulation (解除政府对......的控制) of industry, and an abundance of accessible capital. We have experienced both the benefits and risks of a truly global economy, with both Wall Street and Main Street (平民百姓) feeling the pains of economic disorder half a world away.
At the same time, we have fully entered the Information Age. Startling breakthroughs in information technology have irreversibly altered the ability to conduct business unconstrained by the traditional limitations of time or space. Today, it’s almost impossible to imagine a world without intranets, e-mail, and portable computers. With stunning speed, the I
A. an increasing number of companies have disintegrated
B. manufacturers must focus on one special product to remain competitive in the market
C. it is physically impossible and prohibitively expensive to do business in the old way
D. businesses have to meet individual customers' specific needs in order to succeed
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