Invisibility Ring Scientists cant yet make an invisibility cloak1 like the one that Harry Potter2 uses.But,for the first time,theyve constructed a simple cloaking device that makes itself and somethingplaced inside it invisible to microwaves. Invisibility isnt possible yet with waves of light that the human eye can see.But it is nowpossible with microwaves.Like visible light,microwaves are a form of radiant energy.Theyare part of the electromagnetic spectrum,which also includes radio waves,infrared light,ultraviolet rays,X rays,and gamma rays.The wavelengths of microwaves are shorter thanthose of radio waves but longer than those of visible light. To a detector set up to receive microwaves on the other side of the ring,it looks as if thewaves never changed their paths as if there were no object in the way! So,the ring is effectively invisible. 练习: Acan now make an invisible cloak of the same kind as he uses. Ctry to invent a device Similar in idea to the invisible cloak he uses. 2.What is true of microwaves? BTheir wavelengths are longer than those of visible light. DThey are visible to the human eye. AIt is made of a special material with unusual ability. CMicrowaves pass through it when they strike it. side. AA disk or plate placed under a drinking glass to protect a table top. CA roller coaster. 5.Harry Potters invisibility cloak doesnt have any real competition yet, Ascientists have not found out how his cloak works. Cthe cloaking device works only for microwaves. 答案与题解: 2.B第三段最后一句中告诉我们,A是错误选择,B是正确选择。该段第三句说,微波与可见光一样都是一种辐射能,所以C的说法是错误的,不能选择;根据该段第一句:with wavesof light that the human eye can see和第三句:Like visible light,可以得知D是错误的说法,也不能选择。 4.A第四段第一句告诉我们,科学家的这个隐形装置和一个杯垫差不多大小,所以A是正确选择。coaster是一个多义词,其他几个选择是该词的其他意思,B:从事沿海贸易的船;C:过山车,摩天轮;D:海岸地区居民。
英语美文30篇系列之21
英语美文:A Psalm of Life 人生礼颂
精美散文:让我们撩起生命的波纹
精选英语散文欣赏:一棵小苹果树
态度决定一切 Attitude Is Everything
精美散文:守护自己的天使
双语美文:What are you still waiting for?
英语美文欣赏:A beautiful song
精选英语美文阅读:一封未发出的英文情书《但是你没有》
精选英语美文阅读:A Friend's Prayer 朋友的祈祷
浪漫英文情书精选:Need You With Me需要你爱我
浪漫英文情书精选:My Everything我的一切
伤感美文:人生若只如初见
浪漫英文情书精选:The Best Surprise最好的惊喜
如果生命可以重来(双语)
生命可以是一座玫瑰花园
浪漫英文情书精选:Is It Love?这是爱么?
精选英语美文阅读:饶孟侃《呼唤》
精选英语美文阅读:哪有一株忘忧草? (双语)
浪漫英文情书精选:My Heart And Soul我的灵魂
双语美文:I Wish I Could believe
美文:爱的奇迹
英语美文:Keep on Singing
精选英语美文阅读:被忽略的爱 Helpless love
双语阅读:回家的感觉真好
英语美文:越长大越孤独(双语)
精选英语美文阅读:爱的奇迹 Keep on Singing
双语散文: Optimism and Pessimistic
浪漫英文情书精选:Could This Be Real?这是真的吗?
最美的英文情诗:请允许我成为你的夏季
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