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In addition to the established energy sources such as gas, coal, oil and nuclear, there are a number of other sources that we ought to consider. Two of these are hydroelectric and tidal power. These two sources are {{U}} (21) {{/U}} in that they are both renewable. {{U}} (22) {{/U}}, hydropower is more widely used than tidal. In {{U}} (23) {{/U}}, a substantial amount of electricity is already produced in HEP (hydroelectric power)stations worldwide, {{U}} (24) {{/U}} tidal stations are still in the very early {{U}} (25) {{/U}} of development. As far as geographical {{U}} (26) {{/U}} is concerned, HEP projects are to be found on lakes and rivers, while tidal {{U}} (27) {{/U}} are constructed only at river mouths where tidal {{U}} (28) {{/U}} is great. Unfortunately these are {{U}} (29) {{/U}} in number.At present HEP stations are found mainly in Norway,Canada, Sweden andBrazil, whereas tidal plants are in {{U}} (30) {{/U}} in France, Russia andChinA、 As regards capital {{U}} (31) {{/U}}, both require very high investment. On the other hand, generating {{U}} (32) {{/U}} are quite low in both cases. In fact, a large scale HEP plant is capable of producing power more {{U}} (33) {{/U}} than conventional sources, such as coal, oil and nuclear plants. Tidal power also compares {{U}} (34) {{/U}} with nuclear and oil generated electricity, {{U}} (35) {{/U}} the amount of money on production. {{U}} (36) {{/U}} HEP stations, tidal constructions have a long life {{U}} (37) {{/U}}. It is estimated that they can operate for over 100 years. With respect to {{U}} (38) {{/U}} of supply, tidal stations {{U}} (39) {{/U}} from HEP ones in that they often can only supply power {{U}} (40) {{/U}}. HEP stations, however, provide a constant supply of electricity. |
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AnnCurry is a famous news presenter of the NB C、News "Today" show. When she was 15 she happened to walk into a bookstore in her hometown and began looking at the books on the shelves. The man behind the counter, Mac McCarley, asked if she’d like a joB、She needed to start saving for college, so she said yes. Ann worked after school and during summer vacations, and the job helped pay for her first year of college.During college she would do many other jobs: she served coffee in the student union, was a hotel maid and even made maps for the US Forest Service.But selling books was one of the most satisfying jobs. One day a woman came into the bookstore and askedAnn for books on cancer(癌症). The woman seemed anxious.Ann showed her practically everything they had and found other books they could order. The woman left the store less worried, andAnn has always remembered the pride she felt in having helped her customer. Years later, as a television reporter in LosAngeles,Ann heard about a child who was born with problems with his fingers and his hanD、His family could not afford a surgical(外科的) operation, and the boy lived in shame, hiding his hand in his pocket all the time. Ann persuaded her boss to let her do the story.After the story was broadcast, a doctor and a nurse called, offering to perform the surgical operation for free. Ann visited the boy in the recovery room after the operation. The first thing he did was to hold up his repaired hand and say, "Thank you. " What a sweet sense of satisfactionAnnCurry felt! At McCarley’s bookstore,Ann always sensed she was working for the customers, not the store. Today it’s the same. NB C、News pays her, but she feels as if she works for the people who watch the programmes, helping them make sense of the worlD、 |
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Inhissparetime,anAmericanusually______.A
[A] has a good rest |
[B] plays cards with their friends |
[C] gets some more money by working |
A.HesawMissZhangintheshop.B.HesawMissZha
Onanaverage,peopleinAmericawhowerebornin
Accordingtothispassage,whichfactorinflue
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WhatisFrankplanningtodoA.Movetoabigcity.
Howmuchdoestheman’saccounthavetodayA.$23
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