Visitors must present all carried items for inspection upon entry. After inspection, all bags, backpacks, umbrella, parcels and other items as determined by security officers must be left at the checkrooms, free of charge, close to each entrance. All oversized bags, backpacks and luggage must be left at the checkrooms near the 4^th Street entrance of either the East or West Building. These items will have to be x-rayed before being accepted. Items of value, such as laptop computers, cameras and fur coats, may not be left in the checkrooms but may be carried into the gallery. We regret that the museum doesn't have enough space for visitors items larger than 17*26 inches in the gallery.

    Additional security procedures and checks may be taken according to the decision of the gallery.

    *For the safety of the artworks and other visitors, nothing may be carried on a visitor's back. Soft front-baby carriers are allowed, but children may not be carried on shoulders or in a child carrier worn on the back. Wheelchairs are available free of charge near each checkroom.

    *Smoking is prohibited. Food and drink are not permitted outside the food service areas. Unopened bottled water may be carried only in a visitor's bag. Cell phones may not be used in the gallery.

    *Animals, other than service animals, are not permitted.

    *Skateboarding is prohibited.

    *Picture-taking(including video) for personal use is permitted except in the special exhibits.

    *Please don't touch the works of art.

    Research finds out why some people are constantly under attack from the bloodsucking insects while others walk free.

    For those unfortunate enough to feature highly on the mosquito hit list, summer nights can be synonymous with mosquito bites. Yet others hardly ever get bitten. So how do the bloodthirsty insects select their victims?

    The insects' tastes may seem arbitrary. However, research shows that when mosquitoes make their choices between potential victims, it all comes down to scent (气味).

    “Mosquitoes are attracted by carbon dioxide and heat, which everyone gives off. But mosquitoes are also attracted by certain scents,” says Karl-Martin Vagn Jensen, the head of research at the Department of Agricultural Science at Arhus University.

    According to Jensen, it has not yet been confirmed exactly what the scents in question are. But research does indicate that some scents are more attractive to mosquitoes than others.

    “All the lab employees rubbed petri dishes (培养皿) against their stomachs. In that way, their scents were put on the dishes, which were then put in a container full of mosquitoes,” he says. “The mosquitoes repeatedly landed on some of the petri dishes, but didn't go anywhere near the others.”

    Perhaps taking inspiration from popular fiction, there are also those who consider garlic as an excellent repellent (驱虫剂) against the winged bloodsuckers. According to the researcher, this strategy may not be entirely fruitless. “As far as I know, there is no scientific proof that eating garlic works. But there may be something to the theory that it's possible to mask scent with garlic,” he says. The only reliable method of protection against mosquitoes is to use repellents that are sold over the counter. It contains some smells that can confuse the mosquitoes. When the mosquito comes closer, it uses smell, heat and carbon dioxide to decide whether to bite. But if it is confused by a repellent, it will never get that far.

    We Brits love the idea of a real Christmas tree but not so many of us like the realities of dragging (拖拽) a 7ft Norway Spruce through the house and leaving needles all over the place.

    If you count yourself among the reluctant group, then it may be time to go fake (假的) . After all, buying an artificial Christmas tree needn't mean accepting defeat. There's a huge range of choices and sizes, including pre-lit trees, which will save you the frustration of trying to string your own lights.

    Another big advantage of choosing an artificial Christmas tree is cost: artificial trees can last for decades, so they work out cheaper than paying for a real tree every year. Like now retailers (零售商) are offering great deals at the moment: at Tesco, there's 25 percent off artificial Christmas trees. Meanwhile, you can take advantage of the current 3 for 2 offer at Argos to fill your house with not one, not two, but three. You may perhaps partner up with friends who are also looking to invest.

    Of course, keep your tree for years and years and it will start to pay you back in terms of carbon footprint; however, a “real” one will always have to be transported, used and dealt with every year.

    Are there any downsides? Yes. You might think you're saving the planet, but a fake tree is actually not an environmentally friendly option. Most are made in factories in Asia, resulting in some serious air miles to reach the UK. They're made from metal and plastic, and many end their lives in landfill (垃圾填埋).

    Another problem with a fake tree is that they don't look very natural and of course you won't get that lovely pine smell either. You'll also need to find space for storage.

    "It can't be done." Boyan Slat heard this over and over when he first proposed a way to clean up millions of tons of plastic polluting our oceans. Almost anyone else would have given up in frustration and despair. But 20-year-old Slat hasn't: been discouraged but committed to his dream. "Human history is basically a list of things that couldn't be done, and then were done," he says. Today, slat and his team at The Ocean Cleanup are well on their way to proving the critics wrong. Good news for the planet.

    ⑴_______.

    Slat, who grew up in the city of Delft in the Netherlands, was on a diving trip in Greece three years ago when he was deeply impressed by plastic, "There were more plastic bags than fish," he says. "That moment I realized it was a huge issue and that environmental issues are really the biggest problems my generation will face."

That fall, Slat, then 17, decided to study plastic pollution as part of a high school project. Soon, Slat learned that no one had yet come up with practical way to clean up this massive garbage patches. Most proposed solutions involved "fishing" up the plastic using ships equipped with nets﹣which, as Slat discovered, would likely take more than 1,000 years, cost too much, let off too much sea life along with the trash.

    Slat proposed an alternative that mostly avoided these problems﹣a solar﹣powered system using a floating plastic tube which will go around the garbage and trap it is 600 meters long, A big screen hangs down from it, about three metres into the water. Wind, waves and ocean currents will push the trash toward the tube. （Fish can swim under the screen） A ship will pick up the trash and take it back to the shore to sort and recycle it into oil and other products. Best of all, Slat predicted his system could clean up the North Pacific Garbage Patch between California and Hawaii where a lot of floating garbage exists, within five to 10 years.

    ⑵________.

    The following, Slat entered the aerospace engineering program at the Delft University of Technology and officially announced his ocean cleanup concept at TEDx Delft. But nothing much moved forward,

    Slat found himself continually absent﹣minded in classes, looking for ways to improve his concept. "It wouldn't let go. I finally decided to put both university and my social life on hold to focus all my time on developing this idea. I wasn't sure if it would succeed, but considering the scale of problem I thought it was important to at least try." He says.

    With this family's blessing, Slat began in earnest organizing a team of volunteers and employees for The Ocean Cleanup, which now numbers about 100.

    ⑶_______.

    In answer to opposition, Slat and his team raised ＄100,000 from a crowd funding campaign and began testing a 40﹣meter collecting barrier near the Azores Islands last March. In June, they released a 500+ page possibility study.

Over the next three to four years, Slat will push toward a fully operational large﹣scale project by testing a series of longer and longer barriers. He's currently seeking to crowd fund ＄2 million to finance it. Incidentally, The Ocean Cleanup is also working on a plan to stop plastic from washing into the oceans in the first place. "It's just the other problem that is equally important." Slat says. "It's something everyone is able to help with, and we also have some technologies in the pipeline."

    As for school, Slat doesn't miss it﹣except maybe for the social﹣part, which he hopes to （恢复） a bit once his team takes on more of the workload. "I don't have time for things like that right now, but I really can't complain. I can imagine doing something more fun than being able to have an idea and then actually making it into a reality." he says.

    Many automobile makers present their newest designs at car shows around the world. Many designers seek to create the car of the future. One device that is popular among car manufacturers(生产商) is an autopilot. Autopilot permits a car to drive itself without human control.

    A recent car show in Geneva, Switzerland also presented other possible designs, including cars manufactured in 3-D printers.

    Rinspeed is a Swiss design company. It showed a vehicle based on the US electric car Tesla Model S, but the Rinspeed car includes a large television and an espresso coffee maker.

    Frank Rinderknecht is the CEO of Rinspeed. He says he does not want to just sit and watch the steering wheel(方向盘) turn as he rides in a car with autopilot.

    "I want to ride; I want to sleep, relax, watch movies, news, anything else. So that's the vision which we have. One day on the boring motorway traffic, you just do anything which makes your life better," said Rinderknecht.

    One of the most interesting ideas presented at the show is a car built on a 3-D printer. The German engineering firm EDAG designed the car. The body of the vehicle called "Genesis" is printed in one piece from a material called thermoplastic(热塑性塑料).

    Christoph Horvath is spokesman for EDAG.

    "To create a car without the use of any tool. This would be a real revolution for the industry," said Horvath.

    EDAG says it based its design on a turtle shell. The company says the design provides the right amount of strength and firmness.

    Other automakers did not look so far into the future. Czech automaker Skoda presented its "Vision C" model vehicle. The car has an environmentally friendly natural gas engine.

    Jo Davidson is a company spokeswoman. She says the car releases very low levels of the pollutant gas CO₂. Ms Davidson says the "Vision C" plans to be launched in two years.

Small words may help you beat stress and improve your relationships. Use these tips to teach yourself a helpful and useful vocabulary.

I get to

"Many of us begin our day with the phrase 'I have to'," says Catherine Grace O'Connell, a self-development expert. "Changing this to 'I get to' has the possibility to change the way our day goes. "Even if you may not be happy about going to work or cooking dinner, saying that you "get to" do those things changes your attention to the positive aspects of those things.

Thank you

A lot of research has been done on why people — especially women — often don't accept compliments smoothly. Language in Society found that women only accepted compliments 40 percent of the time, and Harvard Business Review found that almost 70 percent of people connected receiving compliments with a little shame or embarrassment. Does this sound familiar? She says, "I love that dress." You say, "Oh this? I've had it for years." Or," You think? I'm not crazy about the color." We often demean (贬低) ourselves while doing this. A better way to respond: Look the person in the eye and simply say, "Thank you."

Not yet

Adding "yet" to the end of your words, especially when talking about abilities and goals. is a small but good way to change your attitude to life. "Add the word 'yet' to limiting comments," suggests Kyndall Bennett, another self-development expert. "When we do this, we allow ourselves to accept the limiting thoughts as truths," Bennett says. "Examples of this would be like, 'I can't speak a second language... yet' and 'I don't know how to run my own business... yet.'" This works for everything from weight loss to relationships; it's a way to add a certain optimism to your words.