As there is less and less coal and oil, scientists are exploring new ways of making use of _______ energy, such as sunlight, wind and water for power and fuel.

单选题

As there is less and less coal and oil, scientists are exploring new ways of making use of _______ energy, such as sunlight, wind and water for power and fuel.

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单选题

. There is beauty on all these levels.Our world needs software--lots of software. Fifty years ago software was something that ran in a few big and expensive machines. Thirty years ago it was something that ran in most companies and industrial settings. Now there is software running in our cell phones, watches, appliances, automobiles, toys, and tools. And need for new and better software never( 作答此空 ). As our civilization grows and expands, as developing nations build their infrastructures, as d

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判断题

Learning English is hard and there is no way. (? )

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判断题

any changes in a country and in people‘s lives. People build new hotels and restaurants and train native men and women as guides to show visitors interesting places. There‘re new night clubs and other amusement. International tourism is clearly a big business.In the old days, only the rich could travel to foreign countries.More people travel today than in the past because people now have spare time for traveling.Travel by air to other countries is much more expensive and attractive today.More gu

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材料题

st of the world would face a more promising future. However, analysts now accept that the US will only recover very slowly.Consumer and investor confidence is still lacking. Large deficits and declining short-term interest rates mean there is little scope for economic stimulus.The Japanese economy, after years of trade and budget surpluses, is in deep recession and the growth rate has slowed down considerably. German economists have lowered their forecasts for economic growth this year. The low

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