专四新题型测试卷 Test 2 keys

试卷二

Part I Dictation

Ocean Energy

Scientists believe that a great energy source of the future can be found in the world’s oceans. / Ocean energy seems to cause little or no negative impact on the environment, /unlike conventional sources such as oil or coal, /and there is no lack of sea water in the world. /One example of energy source using the world’s oceans is tidal power, /which can be used to produce electricity./

However, the range of tides necessary for an economically worthwhile system/ is found in only a few coastal areas of the world /and the long range effect may slow down the rotation of the earth very slightly./

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