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Germs（细菌）on Banknotes
People in different countries use different types of money:yuan in China,pesos in Mexico,pounds in the United Kingdom,dollars in the United States,Australia and New Zeal-and. They may use different currencies,but these countries,and probably all countries,still have one thing in______(1):germs on the banknotes.
Scientists have been studying the germs on money for well over 100 years. At the turn of the 20th______(2),some researchers began to suspect that germs living on money could spread disease.
Most studies of germy money have looked at the germs on the currency______(3)one country. In a new study,Frank Vriesekoop and other researchers compared the germ populations found on bills of different______(4).
Vriesekoop is a microbiologist at the University of Ballarat in Australia. He led the stud-y,which compared the germ populations found on money______(5)from 10 nations. The scientists studied 1,280 banknotes in total;all came from places where people buy food,like supermarkets,street vendors and cafes,______(6)those businesses often rely on cash.
Overall,the Australian dollars hosted the fewest live bacteria一no more than 10 per square centimeter. Chinese yuan had the______(7）about 100 per square centimeter. Most of the germs on money probably would not cause harm.
What we call“paper money”_________(8)isn't made from paper. The U. S. dollar,for ex- ample,is printed on fabric that is mostly cotton. Different countries may use different______(9)to print their money. Some of the currencies studied by Vriesekoop and his team,such as the American dollar,were made from cotton. Others were made from polymers.
The three______(10)with the lowest numbers of bacteria were all printed on poly-mers. They included the Australian dollar,the New Zealand dollar and some Mexican pesos.
The______(11)currencies were printed on fabric made mostly of cotton. Fewer germs lived on the polymer notes. This______(12)suggests that germs have a harder time staying alive on polymer surfaces. Scientists need to do more studies to understand______(13)germs live on, mon-ey—and whether or not we need to be concerned. Vriesekoop is now starting a study that will______(14)the amounts of time bacteria can stay alive on different types of bills.
Whatever Vriesekoop finds,the fact remains:Paper money______(15)germs. We should wash our hands after touching it;After all,you never know where your money's been. Or what's living on it.

7._________
A: most
B: smallest
C: least
D: latest

参考答案

参考解析
解析：前文说了很多不同国家钞票的不同，最后一个转折，肯定是要说相同的地方。in common是固定搭配，意思是相同，共同。故选C项common。
选century最合理，意为20世纪之交。period(A项）, year(B项）或decade (D项）都不合逻辑。故选C项century。
本段第二句提供了解答本题的线索。Frank Vriesekoop的研究与以前的科学家的研究不同，他比较了各国钱币上的病菌数量，在他之前的科学家的研究范围局限于一个国家的纸币。四个选项中只有within表达“在（一个国家）里”的意思。故选B项within。
经过第四题选词的思索过程，本题很自然在different之后用countries，指不同的国家。故选A项countries。
上一句说Vriesekoop比较不同国家纸币携带病菌的数量。本题的句子明确指出他对比的纸币涉及十个国家。四个选项中只有gathered（收集）与上下文的意思相匹配。故选D项gathered。
填词所在的句子与前面的主句存在因果关系。为什么要从食品店和食品摊收集纸币呢？ 因为这些地方常要用现金支付。所以本题答案是A项because。
上一句中说澳元携带最少的细菌，本句与上一句是相对的，肯定是最多的，选A项most。
本句的句意是我们所说的纸币其实并不是由纸做的。所选的副词来修饰所说，给的四个选项分别是A项“相似地”；B项“简直不”；C项“轻微地”；D项“通常地”。所以选 D项usually合适。
本段说纸币的材料一般不是纸，通常是用棉花织物或高分子聚合物制作的。所以C项materials（材料、原料）是正确的。
前文说了不同国家的纸币携带的细菌数量不同，此处选B项货币最为合适。填入后全句意思就是：含细菌最少的三个国家的纸币……。故选B项c盯rencies。
the other＋名词表示“其他的……”。其他选项从语法上无法与the搭配。此句意为：其他纸币大部分是印在棉织物上的。所以选D项other。
本句前面两句讲述了细菌在什么样的介质上更容易存活。承接下来的应该是对之前的总结。本句四个选项的含义分别为A项“连接”；B项“参与”；C项“表述”；D项 “估计”。C选项比较合适，填入后句意为：前面的表述说明细菌在聚合物表面不易存活。故选 C项expression。
科学家要研究细菌如何在纸币上存活。所以本句选how。 if(A项）, where(B项）, when(D项）都与文意不符。故选C项how。
on different types of bills（在不同的纸币上）说明是比较关系，所以本句要选compare“比较”。故选B项compare。
纸币和细菌的关系肯定是纸币携带细菌。“避免”(A项）、“杀死”(B项）和 “选择”(D项）细菌都不正确。所以选C项carries。
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考题 共用题干 Google's Solar Energy Gambit（策略）Google is making its largest investment yet in clean energy,setting up a $280 million fund to finance home solar rooftop（屋顶）installations.The search giant announced today it was teaming up with the Silicon Valley's Solar City一a company chaired by Paypal co-founder and Tesla Motors executive Elon Musk一in an effort to break down the biggest barrier to solar energy adoption:the cost."It's a great way to support installations going into more homes,"said Google spokesperson Parag Chokshi.The $280 million fund is the largest fund ever created for residential solar in the United States,according to Solar City,which has raised a total of$I.28 billion in financing capacity during its five-year history.Google over the past several years has invested in large,utility-scale wind and solar,enhanced geothermal（地热）energy,and other renewable energy projects,for a grand total of more than $680 million in the sector. But today's deal is not only Google's largest foray（突袭）into the sector, it is its first investment in distributed energy. Based in San Mateo,California,less than 20 miles north of Google's Mountain View headquarters,Solar City describes itseff as a solar power service provider. The idea is that people want affordable,clean energy一but they often can't afford to buy a photovoltaic system upfront. Solar City is one of a number of companies that have attempted to help people overcome that cost hurdle（障碍）by leasing,instead of owning their rooftop solar systems.Solar City's leases and power-purchase agreements to homeowners,businesses,and schools promise a lower monthly electricity bill(including a set payment to Solar City in addition to utility payments)than customers would get with their usual electricity from the grid.Solar City not only finances these photovoltaic projects,but also designs,installs,monitors,and maintains the systems. Recently,since buying the assets of a company called Business Solutions last year,Solar City has also begun offering energy audits and small home improvements(like installing programmable thermostats)that can make a big difference in energy use.Until now,Solar City has financed most of its 15,000 projects through banks,Chief Executive Lyndon Rive said in an interview. But the problem is only about a half dozen banks are doing solar financing,he said.So in order for Solar City's model to achieve"true scale,"it must"unleash the available capital of corporate America,"he said.Rive is hopeful that Google's move today will set an example for other corporations to make similar investments. Solar City is the name of a city in America.A:Right B:Wrong C:Not mentiond
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考题 共用题干 Squishy Cellphones Add a Buzz to CallsVibrating rubber could be the next big thing in mobile communications.They allow people to communicate by squishing the phone to transmit_______(51)along with their spoken words. According to a research team at the MIT Medical Lab in Cambridge,Massachusetts,the idea will make_______(52)more fun.Many mobile phones can already be made to vibrate（振动）_______(53 ) ring when you do not want people to know you are getting a call. But these vibrations,_______(54)by a motor spinning an eccentric（离心的、偏离的）weight inside the device, are too crude for subtle com-munication,says Angela Chang of the lab's Tangible Media Group.“They're_______(55)on or off,”she says.But when you grip Chang's prototype（样机）latex（橡胶）celiphone,your fingers and thumb wrap around five_______(56)speakers. They vibrate_______(57)your skin around 250 times per second.Beneath these speakers sit pressure sensors,so you can transmit vibration as well as_______(58)it. When you squeeze with a finger,a vibration signal is transmitted _______(59)your caller's corresponding finger. Its_______(60)depends on how hard you squeeze.She says that within a few minutes of being given_______(61)the phones,students were using the vibration feature to add emphasis to what they were saying or to interrupt the other speaker. Over time, people even began to transmit their_______ (62) kind of ad hoc（特别的）“Morse code”,which they would repeat back to show they were following what the other person was saying.“It was pretty easy to communicate,though we didn't specifically pre-arrange _______(63),”says David Milovich,one of the students who tried out the device.Chang thinks“vibralanguages”could_______(64)for the same reason as texting:some-times people want to communicate something_______(65)everyone nearby knowing what they are saying.“And imagine actually being able to shake someone's hand when you close a business seal,”she says.53._________A: as much asB:as well asC: in spite ofD: instead of
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