2.had it not been for the development of metamaterials:如果超材料尚未得到开发的话。该句使用的是虚拟过去时的倒装结构。虚拟过去时表示与过去事实相反的假设;因为是倒装结构,所以将情态动词had提到主语之前。如使用正常语序,该句可写为....if it had not been for the development of metamaterials.
3.metameans beyond, and metamaterials can do things beyond what we see in the natural world-like shuffle light waves around an object,and then bring them back together:meta的词义是超越,metamaterials能做出我们在自然界看不到的事情,例如将光波移动到某个物体周围,然后将光波全部收回。
4.Louisiana Tech University in Ruston,Louisiana:路易斯安那理工大学,位于路易斯安那州拉斯顿市。该校为公立大学,1894年建校,是美国最为重要的研究型大学之一。
5.the Polytechnic University of Valencia in Spain:瓦伦西亚理工大学,位于西班牙东南部的瓦伦西亚市,该校建于1968年。
6.oil rigs:石油钻塔
练习:
1.What is true for metamaterials?
A.They will always remain in science fiction.
B.They are already a reality.
C.They are nonexistent in nature.
D.Scientists begin to use them to build invisible cloaks.
2.A hyperlens is a more powerful tool than a traditional lens
A.as it can allow scientists to see small things.
B.as it can help photographers to capture images far away.
C. even if it is made of ordinary materials.
D.as it can help scientists to see even the wavelengths of visible light.
3.Scientists at the Polytechnic University of Valencia try to invent
A.an acoustic cloak that can shuffle waves of light.
B.an invisible cloak that can shuffle waves of sound.
C.an acoustic cloak that can shuffle waves of sound.
D.a cloak that is made of materials found in nature.
4.According to Sanchez-Dehesa,
A.it is of great possibility to build an acoustic cloak soon.
B.it is possible to build an acoustic cloak in theory but far from reality.
C.it is totally impossible to build an acoustic cloak.
D.it is theoretically impractical to build an acoustic cloak.
5.What ways are some scientists looking into to protect the island and oil rig from tsunamis?
A.Surround them with metamaterials as protective shields.
B.Stopping the tsunami with metamaterials hours before it reaches them.
C.Building them with larger metamaterials to keep away tsunamis.
D.Using the equipment made of metamaterials to forecast arrival of a tsunami.
答案与题解:
1.C A不是正确答案,因为短文一开始的句子使用了虚拟语态,句子的意思是:如果超
材料尚未得到开发的话。也就是说,科学家已经在研发超材料。短文的后面部分也进一步提到科学家正致力于超材料的开发。但是因为超材料尚未研发成功,科学家更没有开始使用超材料来制造隐身衣,所以B和D也不是正确选择。第二段的第一句提供了答案。
2.D A、B所述功效均是第三段中普通的lens能够达到的功效,所以不是正确选择。Hyperlens不是用普通材料制成,所以C也是错误选择。短文第四段对hyperlens做了描述,
结合第四段内容可以得到D选项提供的结论。
3.C短文的第七段提供了答案。该段的大意是:瓦伦西亚理工大学的研究者Jose Sanchez-Dehesa试图研发acoustic cloak,其原理与invisible cloak相同,只是acoustic cloak移动声波,而不是移动光波。所以,只有C是正确的选择。
4.B 短文的第八段提供了答案。工程师Sanchez-Dehesa认为,成功开发acoustic cloak在理论上是可能的,但他对是否能成功表现出怀疑。
5.A 短文的最后一段告诉我们,科学家也在研究如何将超材料应用于抵御海啸的袭击。可以在岛屿周围使用超材料作为防护,因为超材料可以让海啸改变行走方向。A表达了这层意思,所以是答案。文章没有说,在海啸到达之前数小时用超材料
将海啸档住,B不是答案。文章没有建议用超材料建造海岛和石油钻塔,C不是答案。D的内容是用超材料制作海啸预警器,文章中没有提及,也不是答案
国际英语资讯:Trump, May meet on Iran, DPRK issues: White House
中美创新:如今谁在山寨谁?
去欧洲旅游最值得买的纪念品(组图)[1]
国内英语资讯:Chinese FM meets Syrian deputy prime minister
国际英语资讯:Dominica PM confirms at least 15 killed in hurricane Maria attack
国际英语资讯:Death toll climbs to 273 in central Mexico quake
英语美文:希望总是多过盼望
国内英语资讯:China Focus: Documentary inspires public confidence in national achievements
青春是一种荣耀,但变老也没那么可怕
The Road I Chose 我选择的路
中美创新:如今谁在山寨谁?
No slam dunk?
英语美文:幸福好简单,就在你手心上
必胜客推出素食芝士,味道还很不错
137所高校入选“双一流”建设名单
南方医科大学取消男女混宿 遭多数学生反对
联合国小组将搜集伊斯兰国在伊拉克战争罪的证据
国际英语资讯:U.S. trade agency claims injury from solar imports despite industrys opposition
苹果刷脸功能引争议,群众害怕泄隐私
国内英语资讯:Chinese defense minister meets Singaporean counterpart
老外在中国:忠犬相伴
埃尔多安抗议者遭殴打,川普称埃尔多安是朋友
今后逛超市可能连手机都不用带了,带着手去就行了
国内英语资讯:China to keep on pushing for political settlement to Syrian conflict: envoy
体坛英语资讯:Dortmund, Hoffenheim victorious in German Bundesliga
国内英语资讯:Chinese vice minister suggests harmonization of education policies with CEE countries
国际英语资讯:Iranian leaders slam Trumps anti-Iran remarks
国际英语资讯:New Zealands general elections yield no clear winner as tally ends
今后逛超市可能连手机都不用带了,带着手去就行了
研究表明 长途驾驶会导致大脑退化
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |