单选题Geraldine Ferraro said that whoever coined the term ObamaCare was brilliant. A. came upon B. broke down C. made up D. drew on

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单选题As many people hit middle age, they often start to notice that their memory and mental clarity are not what they used to be. We suddenly can't remember where we put the keys just a moment ago or an old acquaintance's name. As the brain fades, we refer to these occurrences as "senior moments." While seemingly innocent, this loss of mental focus can potentially have a detrimental impact on our professional, social, and personal well-being. Neuroscientists are increasingly showing that there's actually a lot that can be done. It turns out that the brain needs exercise in much the same way our muscles do, and the right mental workouts can significantly improve our basic cognitive functions. Thinking is essentially a process of making neural connections in the brain. Because these connections are made through effort and practice, scientists believe that intelligence can expand and fluctuate according to mental effort. A new company has taken it a step further and developed the first "brain training program," called Lumosity, to actually help people improve and regain their mental sharpness. Lumosity is far more than an online place to exercise your mental skills. That's because they have integrated these exercises into a Web-based program that allows you to systematically improve your memory and attention skills. The program keeps track of your progress and provides detailed feedback on your performance and improvement. Most importantly, it constantly modifies and enhances the games you play to build on the strengths you are developing—much like an effective exercise routine requires you to increase resistance and vary your muscle use. Apparently it works. In randomized, controlled clinical trials Lumosity was shown to significantly improve basic cognitive functions. One study showed students improved their scores on math tests by 34 percent after using Lumosity for six weeks. The company says its users have reported clearer and quicker thinking, improved memory, increased alertness and awareness, elevated mood, and better concentration at work or while driving. While many of the games at Lumosity are free, a modest subscription fee is required to use the full program over the long term. However, Lumosity is currently offering a free trial of their program to new users so that you can see how well it works before you decide to subscribe. The company believes the results will speak for themselves.

单选题Before the 1980s, the idea of health insurance was quite ______ to those living in the mainland of China. A. overseas B. abroad C. foreign D. offshore

单选题Laura Bush still remembers the sentence "the old maid of Midland married Midland's most {{U}}eligible{{/U}} bachelor." A. desirable B. negligible C. miserable D. affordable

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单选题This trip offers a unique opportunity to ______ these fascinating creatures in their natural environment. A. interact with B. comply with C. coincide with D. part with

单选题Unless______directed by a doctor, this medicine should be taken three times a day. A. appropriately B. respectively C. thus D. otherwise

单选题Passage Four Initial voyages into space introduced questions scientists had never before considered. Could an astronaut swallow food in zero gravity? To keep things simple, astronauts on the Project Mercury ate foods squeezed out of tubes. It was like serving them baby food in a toothpaste container. But these early tube meals were flavorless, and astronauts dropped too many pounds. "We know that astronauts have lost weight in every American and Russian manned flight," wrote NASA scientists Malcolm Smith in 1969. "We don't know why." Feeding people in space was not as easy as it looked. Floating around in space isn't as relaxing as it might sound. Astronauts expend a lot of energy and endure extreme stresses on their bodies. Their dietary requirements are therefore different from those of their gravity-bound counterparts on Earth. For example, they need extra calcium to compensate for bone loss. 'A low-salt diet helps slow the process, but there are no refrigerators in space, and salt is often used to help preserve foods," says Vickie Kloeris of NASA. "We have to be very careful of that." By the Apollo missions, NASA had developed a nutritionally balanced menu with a wide variety of options. Of course, all the items were freeze-dried or heat- treated to kill bacteria, and they didn't look like regular food. Today, the most elaborate outer-space meals are consumed in the International Space Station (ISS), where astronauts enjoy everything from steak to chocolate cake. The ISS is a joint venture between the U.S. and Russia, and diplomatic guidelines dictate the percentage of food an astronaut must eat from each country. NASA's food laboratory has 185 different menu items, Russia offers around 100, and when Japan sent up its first crew member in 2008, about 30 dishes came with him. Due to dietary restrictions and storage issues, astronauts still can't eat whatever they want whenever they feel like it. In 2008, NASA astronaut and ISS crew member Sandra Magnus became the first person to try to cook a meal in space. It took her over an hour to cook onions and garlic in the space station's food warmer, but she managed to create a truly delicious dish: grilled tuna (金枪鱼) in a lemon-garlic-ginger sauce---eaten from a bag, of course.

单选题He is {{U}}confronted with{{/U}} the moral dilemma of whether to steal a drug he can't afford so that he can save his wife's life. A. met B. baffled C. faced D. squeezed

单选题The Chinese economy is less affected, so there is no reason to take a {{U}}dim{{/U}} view of economic growth. A. pessimistic B. black C. vague D. positive

单选题Whatwilltheydonext?A.WaitforMike.B.CallMiketocome.C.PickMikeupinthemorning.D.Stopworkingfortheday.

单选题Concerned about the future of the country, the new president had a clear ______ of where to lead it. A. fantasy B. vision C. image D. recollection

单选题Today, world leaders are discussing climate change and what-if anything- can be done to combat global warming．Extreme weather conditions have brought home the fact that our climate is changing-and changing fast. It may be easy to be fatalistic about it, but the truth is that although we humans have caused the problem, we also have the solution. " Think global and act local, " said Friends of the Earth founder David Bower. In many small but important ways we can make a difference. Here are my top tips for how to begin: Count your food miles. What you eat and where you buy it affects global emissions. Pollution from transport is the fastest growing source of carbon dioxide emissions, so it is madness to fly out-of-season vegetables across the world to supermarkets. We should lobby supermarkets for a system of classifying food according to the distance traveled: 0 for local food, 1 for British，2 for Europe, and 3 for intercontinental. Turn off anything that winks at you. A video recorder on standby uses almost as much electricity as one playing a tape. Turning down the thermostat by one degree, not leaving TV and music centers on standby, turning off lights, putting lids on cooking pots，and only half-filling kettles can cut energy consumption by 30%，saving your money as well as saving the planet． Just stop using petrol. Yes you can, and the car industry may(eventually) help you. Hydrogen-powered cars are loved by car designers and could become a reality in about 10 years. Meanwhile, consider converting to liquefied petroleum gas(LPG). You won' t be alone: a new pump for this is opening every day. Meanwhile, you can cut down on conventional petrol use just by changing driving habits-no rapid acceleration, lower speeds, keeping tires at the right pressure. Well, you can always walk. Or cycle. The majority of car journeys are less than five miles and, honestly, once you've stepped out, you'll find it' s really not that bad. The only energy used is your own and that's healthy. You only have to look at the collective strength of the people's fuel lobby to know this makes sense. These changes will save your money which you should invest in an ethical saving account. They are profitable and they put the pressure on business to clean up its act.

单选题It made me ask questions about life, death and mortality that ultimately helped me get through the disaster.

单选题If you're making a conscious effort to ______ lies, experts suggest seeking like-minded, honest folk. A. cut back on B. be crazy about C. look up to D. get down to

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单选题In my opinion, you can widen the______of this improvement through your active participation. A. dimension B. volume C. magnitude D. scope

单选题These instruments are so powerful as to enable them to ascertain many facts of the deepest interest. A. put out B. find out C. wear out D. turn out

单选题Snow is not predicted for today; we can expect some rain, though. A. although B. therefore C. yet D. however