Manhattan Island is surrounded on the east by the East and Harlem Rivers and on the west by the North and Hudson Rivers.It links with the other four towns which make up New York City and with New Jersey are by means of subways,underground tunnels and bridges which lead into Manhanttan from the surrounding area. The Brooklyn Bridge was the first suspension bridge to link Brooklyn to Manhanttan.It is also the second oldest bridge in New York.The architect was John Augustus Roebling,who was the chief engineer of the suspended Railroad Bridge at Niagara Falls. Misfortune accompanied the building of the bridge,which took place from 1869 to 1883.The architect died as a result of an accident early during the construction.His son,Washington Roebling,carried on his father's work,using the most advanced engineering techniques of the day.He also fell ill during the construction of the bridge and was obliged to direct the work on it from an apartment window overlooking the site. Since its construction the Brooklyn Bridge has remained a busy and important passage in New York. The Brooklyn Bridge is 6775 feet long and 1595 feet wide.The suspended part is 3450 feet long and 85 feet wide.It has a clearance of 133 feet above water level.Four huge cables extend across the bridge,supported by two towers,each 272 feet high.Each of these cables is made up of 5700 wires. If you want to go to Princeton University in New Jersey from Manhattan,you _ . A) must drive across a bridge B) must take a Metro train C) have to go through a tunnel D) can use any of the above means
D
(Question)
What will power your house in the future?Nuclear,wind,or solar power?According to scientists at the Massachusetts Institute of Technology (MIT) in the US,it might be leaves -- but artificial ones. Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis .Now researchers have found a way to imitate this seemingly simple process. The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts .Similar to natural leaves,it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell,which uses those two materials to produce electricity,located either on top of a house or beside the house. Though the leaf is only about the shape of a poker card,scientists claimed that it is promising to be an inexpensive source of electricity in developing countries. "One can imagine villages in India and Africa not long from now purchasing an affordable basic power system based on this technology," said Nocera at a conference of the American Chemical Society. The artificial leaf is not a new idea. The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use. The new leaf,by contrast,is made of cheap materials,easy to use and highly stable. In laboratory studies,Nocera showed that an artificial leaf prototype could operate continuously for at least 45 hours without a drop in activity. The wonderful improvements come from Nocera's recent discovery of several powerful,new and inexpensive catalysts. These catalysts make the energy transformation inside the leaf more efficient with water and sunlight. Right now,the new leaf is about 10 times more efficient at carrying out photosynthesis than a natural one. Besides,the device can run in whatever water is available;that is,it doesn't need pure water. This is important for some countries that don't have access to pure water. With the goal to "make each home its own power... The main idea of this passage is _ . A) an introduction to the history of artificial leaves B) a mixture of water power and solar energy C) giving energy to the poor D) an invention copying photosynthesis
(Answer)
D
Ques: It started off as part of French military training and has since evolved as a sport, founded by Sebastian Foucan and David Belle, to encompass a wide variety of techniques, philosophies and exercises. Park-our now enjoys the devotion of many die-hard fans across the world and has been the source for much inspiration. But what is park-our? It is the art of using only your body to navigate from Point A to B in the least time possible, which involves besides leaping, climbing and sprinting, various unusual and complex movements to overcome barriers. Just like the James Bond in the movie Casino Royale? Bond jumps down from a roof to a windowsill and then runs several blocks over _ on the way. It is just because of Bond's wonderful performances that the sport has become popular worldwide. Yes, that's pork-our, an extreme street sport aimed at moving from one point to another as quickly as possible, getting over all the obstacles in the path using only the abilities of the human body. Park-our is considered an extreme sport. As its participants dash around a city, they may jump over fences, run up walls and even move from rooftop to rooftop. Park-our can be just as exciting and charming as it sounds, but its participants see much more in park-our than that. To overcome all the obstacles on the course and in life is part of the philosophy behind park-our. This is the same as life. You must determine your destination, go straight, jump over all the barriers as if in park-our and never fall back from them in your life to reach the destination successfully. A park-our lover said, "I love park-our, because its philosophy has become my life, my way to do everything." Another philosophy we've learned from park-our is freedom. It can be done by anyone, at any time, anywhere in the world. It is a kind of expression of trust in yourself so that you earn energy and confidence. Which of the following is the philosophy of park-our? A) Sports and extremes. B) Excitement and freedom. C) Dreams and success. D) Self-confidence and freedom.
Ans: D
The advantages of using flashcards to build up a vocabulary are well known. You can buy sets of cards, or make your own, and carry them with you wherever you go. There's no question this is useful and because you can use them in short bursts, it's not too much for you. It can be fun. I don't recommend drilling for hours at a time with flashcards. If you want to use flashcard software, things get even better. There are many packages out there for maintaining and drilling flashcards. I recommend VTrain though there are many others. One stands out, however: SuperMemo. Similar to Pimsleur, SuperMemo is engineered according to a carefully researched methodology in order to test you on a card the very minimum number of times you need to see it for it to stick. When you look at a card, you give some feedback to the software on whether you got it right and how easy you found it. It uses this information, and that of your previous attempts, to decide when you will be shown the card next. It's smart and it really works. If you're like me, the news is even better! I have a version of SuperMemo that runs on my PalmOS phone. Wherever I am, if I have my phone handy, I have thousands of flashcards with me too. Honestly, it would be worth purchasing a cheap Palm device only for this. You can pick one up for $20 or even less on eBay or elsewhere. Consider it, at least. What is the main purpose of the author in writing the passage? A) To introduce to us a way to build up a vocabulary. B) To teach us how to make flashcards. C) To suggest us buying flashcards. D) To tell us how to use flashcard software.
A