大学英语六级考试拓展阅读-背诵美文4

2011-07-22 00:00:00来源:网络

2011年6月英语四六级考试真题答案及新东方名师点评


04 Electricity

The modern age is an age of electricity.People are so used to electric lights, radio, televisions, and telephones that it is hard to imagine what life would be like without them. When there is a power failure, people grope about in flickering candlelight, cars hesitate in the streets because there are no traffic lights to guide them, and food spoils in silent refrigerators. Yet, people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for millions of years. Scientists are discovering more and more that the living world may hold many interesting secrets of electricity that could benefit humanity. All living cells send out tiny pulses of electricity. As the heart beats, it sends out pulses of record; they form an electrocardiogram, which a doctor can study to determine how well the heart is working. The brain, too, sends out brain waves of electricity, which can be recorded in an electroencephalogram. The electric currents generated by most living cells are extremely small -- often so small that sensitive instruments are needed to record them. But in some animals, certain muscle cells have become so specialized as electrical generators that they do not work as muscle cells at all. When large numbers of these cells are linked together, the effects can be astonishing. The electric eel is an amazing storage battery. It can send a jolt of as much as eight hundred volts of electricity through the water in which it lives. (An electric house current is only one hundred twenty volts.) As many as four-fifths of all the cells in the electric eel's body are specialized for generating electricity, and the strength of the shock it can deliver corresponds roughly to the length of its body.

\
四六级VIP全程班暑期限时优惠 还送300元大礼包



2011四六级

[词汇] 六级考试必会短语总结 四级考试必备核心词汇

[语法] 四六级考试7大核心语法 攻克四六级语法必备练习

[写作] 四级写作备考必背高分句型 六级写作分段逐句指导

[听力] 听力得分技巧:注意4方面 名师指导四六级考试听力

[阅读] 名师屠皓民讲解六级阅读技巧:快速阅读 精细阅读

[综合] 英语四级考试完形填空最后攻略:单词为重 研习真题

四级历年真题(2001-2010)

六级历年真题(2001-2010)

英语六级无忧计划立减1000元

本文关键字: 新东方

-->

扫码即刻查分 四六级最新答案

四六级好课 海量资料定期更新

更多资料
更多>>
更多内容
更多>>
更多公开课>>
更多>>
更多资料