Read the following article and answer the question. Article: From our smartphones to our latest weaponry, the technology that underpins modern life would be impossible without rare earth metals. The importance of rare earths has only grown as emerging markets increase their demand for technologies made with it, as does the renewable energy industry. The 17 metallic elements are common in the earth-s crust, but the technique used to extract and refine them is labor-intensive, environmentally hazardous and increasingly costly. Thomas Gradael, a professor of geology and geophysics at the Yale School of Forestry Environmental Studies, explains that thecriticality" of rare earths was only recently understood after China, which dominates the world-s supply of the minerals, cut exports by 40% in 2010, citing concerns over how polluting the rare earth industry was. Along with colleagues at Yale, Gradael decided to investigate the metals used in modern technologies to determine if there were viable substitutes."Twenty or thirty years ago electronics were being made with 11 different elements," explains Gradael. "Today's computers and smartphones use something like 63 different elements." Their findings showed that there were no "readily apparent" substitutes for a metal that would not compromise on quality or performance. However increased mining for these scarce resources can have some nasty side effects for the environment. China, which has intensively mined for rare earths with little regulation, allowing it to dominate the global industry since 1990, has acknowledged the incredible environmental harm caused by the process. "Excessive rare earth mining has resulted in landslides, clogged rivers, environmental pollution emergencies and even major accidents and disasters, causing great damage to people's safety and health and the ecological environment," read a white paper issued by the Chinese cabinet in June last year. Recycling metal has been advocated by some as a possible way of managing these precious resources-the European Parliament adopted a law curbing dumping... Question: Why does the author take China as an example in Para.4? Answer:
OPTIONS:
- To tell the wide use of rare earth in China.
- To prove the side effects of rare earth mining.
- To warn people of the possible damage.
- To teach other countries a lesson to follow.
To prove the side effects of rare earth mining.
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Read the following article and answer the question. Article: Oyster What is an Oyster card? Oyster is the easiest way to pay for journeys on the bus, Tube, tram, Docklands Light Railway (DLR), London Overground and National Rail journeys in London. You can store your travel cards, Bus&Tram Pass, season tickets and credit to pay for journeys as you go. Where to get an Oyster card? There are a number of ways for you to get an Oyster card: * At over 3,900 Oyster Ticket stops * At Tube and London Overground station ticket offices * At some National Rail stations * At London Travel information Centres * Online at tfl. gov. uk/oyster How to use an Oyster card? To pay the correct fare on the Tube, DLR, London Overground and National Rail services, you must always touch in on the yellow Oyster card reader at the start of your journey, and touch out at the end. If you don't, a maximum cash Oyster fare will be changed. When using the bus or tram, you must only touch in at the start, but not at the end of your journey. What happens if I don't visit London very often? Don't worry. Any pay as you go credit on your card will not expire , so you can keep it for your next visit or lend it to a friend. Fares Traveling by Tube from Central London (Zone l)to Heathrow (Zone 6) Adult Oyster single fare PS 4. 20 Monday to Friday 06:30 - 09:30 and 16:00 -19:00 PS 2. 70 at all other times including public holidays Adult single cash fare PS 5.00 For further information, visit tfl.gov. uk /fares. Question: Haperson with an Oyster card takes the 7 o'clock Tube from Central London to Heathrow for a week (no public holiday in between),he should pay _ . Answer:
OPTIONS:
- PS 18.90
- PS 29.40
- PS21.90
- PS26.40
PS26.40
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Read the following article and answer the question. Article: Food,football and fashion--Milan has it a11.The city is perhaps most famous for its annual Milan Fashion Week and its world-class soccer teams AC Milan and Inter Milan.And May will see it host the six-month Milan Expo,the theme of which is food and nutrition. Milan may not the first place tourists think of when they think of Italy.Rome is the most famous city in Italian history,Venice draws visitors who want to travel along its canals and Florence is popular with art lovers.Yet Milan can often be left off tourists'lists.But although some see Milan as the"ugly sister"of these cities,according to Lonely Planet,in 2015 the city is"suddenly back in fashion in a big way". The Milan Expo will look at the future of food,trying to answer the question of how Earth's fast-growing population can be fed in the future.According to Lonely Planet website."144 countries will set up shop northwest of central Milan,forming a mini city-within-a-city". Milan's famous opera house,La Scala,normally closed in the summer,will also host daily performances during the expo,reported Fox News. Not interested in opera?Don't worry.Visitors who prefer sports may want to visit the San Siro stadium,home of the soccer teams AC Milan and Inter Milan.Tile stadium is one of the most famous in Europe and has seen many important games over the years,both in Serie A and the European Champions League. So even if all of its fashion and beautiful people can make Milan seem"soulless",as Lonely Planet said.it still has"a serious sense of history and place".Many people will be discovering it this year,and eating great food from all over the world to help solve world problems.Will you? Question: What's the attitudes of the editors from Lonely Planet towards the city of Milan? Answer:
OPTIONS:
- uninterested.
- modest.
- favorable.
- dissatisfied.
favorable.
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