单选题Look After Your Voice Often speakers at a meeting experience dry mouths and ask for a glass of water. You can solve the problem by activating the saliva(唾液) in your mouth. First gently bite the edges of your tongue with your teeth. Or, press your entire tongue to the bottom of your mouth and hold it there until the saliva flows. Or you can imagine that you are slicing a big juicy lemon and sucking the juice. Before you begin your talk, be kind to your voice, Avoid milk or creamy drinks which dry your throat. Keep your throat wet by drinking a little sweetened warm tea or diluted(稀释的) fruit juice. If you sense that you are losing your voice, stop talking completely. In the meantime, do not even talk in a low voice. Save your voice for your health. You may feel foolish using paper to write notes, but the best thing you can do is to rest your voice. If it is necessary, perhaps you can get some advice from a professional singer. What about drinking alcohol to wet your throat? I advice you not to touch alcohol before speaking. The problem with alcohol is that one drink gives you a little confidence. The second drink gives you even more confidence. Finally you will feel all-powerful and you will feel you can do everything, but in fact your brain and your mouth do not work together properly. Save the alcohol until after you finish speaking. Perhaps you want to accept the advice, but you may wonder if you can ever change the habits of a lifetime. Of course you can. Goethe, who lived before indoor skating rinks or swimming pools, said, "We learn to skate in the summer and swim in the winter". Take this message to heart and give yourself time to develop your new habits. If you are willing to change, you will soon be able to say that you will never forget these techniques because they became a part of your body.

单选题The restaurant has a good reputation .

单选题TV Games Shows One of the most fascinating things about television is the size of the audience. A novel can be on the "best sellers" list with a sale of fewer than 100, 000 copies, but a popular TV show might have 70 million TV viewers. TV can make anything or anyone well known overnight. This is the principle behind "quiz" or "game" shows, which put ordinary people on TV to play a game for the prize and money. A quiz show can make anyone a star, and it can give away thousands of dollars just for fun. But all of this money can create problems. For instance, in the 1950s, quiz shows were very popular in the U.S. and almost everyone watched them. Charles Van Doren, an English instructor, became rich and famous after winning money on several shows. He even had a career as a television personality. But one of the losers proved that Charles Van Doren was cheating. It turned out that the show's producers, who were pulling the strings, gave the answers to the most popular contestants beforehand. Why? Because if the audience didn't like the person who won the game, they turned the show off. Based on his story, a movie under the title Quiz Show is on 40 years later. Charles Van Doren is no longer involved with TV. But game shows are still here, though they aren't taken as seriously. In fact, some of them try to be as ridiculous as possible. There are shows that send strangers on vacation trips together, or that try to cause newly-married couples to fight on TV, or that punish losers by humiliating them. The entertainment now is to see what people will do just to be on TV. People still win money, but the real prize is to be in front of an audience of millions.

单选题We have to act within the existing legal framework. A. limit B. procedure C. status D. system

单选题I feel regret about what"s happened.

单选题Guests were scared when the bomb exploded.

单选题Fond industry relies mainly on agriculture for raw material.A. depends onB. dependent onC. derives fromD. derived from

单选题The proposal was {{U}}endorsed{{/U}} the majority of members. A. rejected B. submitted C. considered D. approved

单选题The town is Ufamous/U for its magnificent church towers.

单选题With the increasing unemployment rate, workers who are 50 to 60 years old are usually the first to be ______.A. laid offB. laid outC. laid asideD. laid up

单选题After examining the patient, the doctors could find no Uphysiological/U cause for his illness.

单选题Invisibility Ring Scientists can't yet make an invisibility cloak like the one that Harry Potter uses. But, for the first time, they've constructed a simple cloaking device that makes itself and something placed inside it invisible to microwaves. When a person "sees" an object, his or her eye senses many different waves of visible light as they bounce off the object. The eye and brain then work together to organize the sesensations and reconstruct the object's original shape. So, to make an object invisible, scientists have to keep waves from bouncing off it. And they have to make sure the object casts no shadow. Otherwise, the absence of reflected light on one side would give the object away. Invisibility isn't possible yet with waves of light that the human eye can see. But it is now possible with microwaves. Like visible light, microwaves are a form of radiant energy. They are part of the electromagnetic spectrum, which also includes radio waves, infrared light, ultraviolet rays, X rays, and gamma rays. The wave lengths of microwaves are shorter than those of radio waves but longer than those of visible light. The scientists' new "invisibility device" is the size of a drink coaster and shaped like a ring. The ring is made of a special material with unusual ability. When microwaves strike the ring, very few bounce off it. Instead, they pass through the ring, which bends the waves all the way around until they reach the opposite side. The waves then return to their original paths. To a detector set up to receive microwaves on the other side of the ring, it looks as if the waves never changed their paths as if there were no object in the way! So, the ring is effectively invisible. When the researchers put a small copper loop inside the ring, it, too, is nearly invisible. However, the cloaking device and anything inside it do cast a pale shadow. And the device works only for microwaves, not for visible light or any kind of electromagnetic radiation. So, Harry Potter's invisibility cloak doesn't have any real competition yet.

单选题With adequate support and {{U}}insight{{/U}}, all teachers can be active participants in excellent professional development.

单选题What is Turner likely to study next?

单选题The price of vegetables {{U}}varies{{/U}} according to the weather.

单选题Forests for Cities You are standing in a beautiful forest in Japan. The air is clean and smells like plants and flowers. There are 175 different kinds of trees, and 60 kinds of birds live here. _______ (46) You are downtown in the city of Nara, Japan, in Kasugayama Forest, the oldest urban forest in the world. It was started more than a thousand years ago, and today it's very popular with tourists and artists. Cities around the world are working to protect their urban forests. Some urban forests are parks, and some are just streets with a lot of trees. But all urban forests have many good effects on the environment. _______ (47) They also stop the noise from heavy traffic. They even make the weather better because they make the air 3-5 degrees cooler, and they stop strong winds. Urban forests also have many good effects on people. They make the city more beautiful. In a crowded area, they give people a place to relax and spend time in nature. _____(48) In some countries, people are starting new urban forests. In England, there are now 1.3 million trees in an urban forest called Thames Chase, east of London. It was started in 1990, and it has grown very fast. Walking and bicycle clubs use the forest, and there are programs for children and artists. ____ (49) Some older cities don't have space for a big urban forest, but planting trees on the streets makes the city better. Scientists found that commuters (通勤人员) feel more relaxed when they can see trees. Trees are even good for business. _______ (50) In the future, urban forests will become even more important as our cities grow bigger. In the megacities(超大城市) of tomorrow, people will need more green space to live a comfortable life. Planting trees today will make our lives better in the future. A．People spend more time at shopping centers that have trees B．In hot countries，urban forests are cool places for walking and other healthy exercises C．But you are not in rural area D．Trees take pollution out of the air E．In 2033，it will have 5 million trees F．It has many kinds of birds in the country

单选题The Northern Lights The sun is stormy and has it own kind of weather. It is so hot and active that even the Sun's gravity cannot hold its atmosphere in cheek! Energy flows away from the Sun toward the Earth in a stream of electrified particles that move at speeds around a million miles per hour. These particles are called plasma, and the stream of plasma coming from the Sun is called the solar wind. The more active the Sun, the stronger the solar wind. The solar wind constantly streams toward the Earth, but don't worry because a protective magnetic fields surrounds our planet. The same magnetic field that makes your compass point north also steers the particles from the Sun to the north and south poles. The charged particles become trapped in magnetic belts around the Earth. When a large blast of solar wind crashes into the Earth's magnetic field first gets squeezed and then the magnetic field lines break and reconnect. The breaking and reconnecting of the magnetic field lines can cause atomic particles called electrons trapped in the belts to fall into the Earth's atmosphere at the poles. As the electrons fall into the Earth, they collide with gas molecules in the atmosphere, creating flashes of light in the sky. Each atmospheric gas glows a different color. Oxygen and nitrogen glows red and green and nitrogen glows violet-purple. As these various colors glow and dance in the night sky, they create the Northern Lights and the Southern Lights. Watching auroras is fun and exciting, but normally you can only see them in places far north like Alaska and Canada. The movement of the aurora across the sky is usually slow enough to easily follow with your eyes but they can also pulsate, flicker, or even move like waves. During solar maximum, auroras are seen as far south as Florida, even Mexico! Auroras often seem to be very close to the ground, but the lowest aurora is still about 100 kilometers above the ground, a distance much higher than clouds are formed or airplanes can fly. A typical aurora band can be thousands of kilometers long, a few hundred kilometers high, but only a few hundred meters thick. We hope you are able to travel to far-north places like the Arctic Circle and see the Northern Lights at least once during your lifetime. We know you will never forget it!

单选题What does Ghirardi say about algae?

单选题Officials estimate that the Fort Collins project will cost roughly $ 350 million. The stimulus money kicks in only $ 4.8 million, which leaves the city to do significant fundraising. Money could come from a mix of government, private investments, utility companies, and research and development grants. "It's a ton of money and there's no way we can do this on our own, "says Mike Freeman, Fort Collins's chief financial officer and economic-development guru (专家). "The biggest risk for us is that we won't have enough money and that this will take 20 years." Fort Collins project call possibly get financial support from all the following source EXCEPTA. government.B. personal investments.C. financial institutions.D. research and development grants.

单选题She exhibited great powers of endurance during the climb.