The world is not only hungry, it is also thirsty for water. This may seemstrange to you, since nearly 75％of the earth's surface is covered with water. But about 97％ of this huge amount is seawater, or salt water. Man can only drink and use the other 3％--the fresh water that comes from rivers, lakes, underground, and other sources. And we cannot even use all of that, because some of it is in the form of icebergs and glaciers. Even worse, some of it has been polluted. 　　However, as things stand today, this small amount of fresh water, which is constantly being replaced by rainfall is still enough for us. But our need for water is increasing rapidly almost everyday. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect on agriculture and industry. Let me give you just one small example of how necessary water is to industry. Did you know that to produce a single ton of steel, it takes about 91000 litres of water? 　　We all have to learn how to stop wasting our precious water. One of the first steps we should take is to develop ways of reusing it. Experiments have already been done in this field, but only on small scale. The systems that have been worked out are similar to those used in spacecraft. (1) “The world...is also thirsty for water.” this means that ________. [　　]A．the world has not enough fresh water to meet our future needs B．people all over the world are thirsty for water now C．we are now facing a serious problem of world-wide water shortage D．we cannot make use of all the fresh water on earth (2) According to the passage, only about ________ of the earth's surface is covered with fresh water that can be used.[　　]A．75％B．3％C．97％D．2.3％(3) We may face a severe worldwide water shortage in the future because ________. [　　]A．the small amount of fresh water is constantly being replaced by rainfall B．some of it has been polluted C．some of it is in the form of icebergs and glaciers D．our need for fresh water is increasing rapidly (4) According to the passage, one of the first problems is ________.[　　]A．to deal with water problem now B．to have lectures on the water subject C．to develop ways of reusing water D．to work out systems that resemble those used in spacecraft (5) This passage is mainly about ________.[　　]A．water and the earth B．fresh water on earth C．water shortage problem D．experiments on how to reuse fresh water

His quick expression told me that he did not       us.（　　）A. agree toB. agree withC. agree onD. agree about

The team just came out for the second half with a different _____. A attribute B altitude C attitude D aspect

从括号中选择正确的词填空，使短文意思完整，必要时需改变词的形式。(and, receive, satellite, weather, change, help, or, early, for, when, forecast, star)　　Now satellites are helping to forecast(预报)the weather. They are in space, and they can reach any part of the world. The 1______ take pictures of the atmosphere(大气), because this is where the weather forms(形成). They send these pictures to the 2______ station. So the scientists there can see the weather of any part of the world and tell how the weather will change.　　Today, nearly five hundred weather stations in sixty countries can 3______ satellite pictures. 4______ they receive the new pictures, they compare(比较)them with the earlier ones. Perhaps they may find that the clouds have 5______ during the last few hours. This may mean that the weather on the ground may soon change, too. In their next weather 6______, they can tell people about it. So the weather satellites are of a great 7______ to the scientists at the station. In the past they could forecast the weather for about 24 or 48 hours 8______. Now they can make good forecasts for three 9______ five days. Soon, perhaps, they may be able to forecast the weather 10______ a week or more ahead.

扫描器的任务是从________中识别出一个个单词符号。

When it comes to traveling, sometimes taking a journey alone can be great. Traveling solo allows for a time of introspection (内省), relaxation and self-discovery, when you can take the time to soak in the finer things the world has to offer. The independence gained by going alone allows for the opportunity to experience your choice destination exactly the way you want. (1) Where to stay So you’ve finally decided to take advantage of some well-earned vacation time and visit Prague, the city of your dreams. Because you’ll be all by yourself, the planning of your trip is automatically different. One of the first questions worth addressing is how you’re going to spend your time in the beautiful Czech Republic capital. Are you going on a shoestring (用钱极少的) budget, or would you rather go all-out and book a room in a fancy hotel Because traveling alone means your money is funding the trip, a wise choice would be to stay in youth hostels. Cast away the misconception that these places are unaccommodating and dirty, and accept the fact that hostels provide safe, clean, comfortable, and most importantly, cheap housing that millions of students and thrifty travelers take advantage of every year. It is relatively easy to book a room at a hostel via the Internet, and plenty of information is available about each one. On the other hand, if you can’t wait to take advantage of room service and a nice bath tub, opt for a hotel. (2) Have a plan Along with securing your accommodations, prepare an itinerary (行程表) for each day before you leave. This plan should include everything from visiting ’all the famous landmarks to some relaxation time, which is essential since you’ll likely be walking for miles in your comfortable shoes(invest in a good pair, it will pay off). As great as organization is, however, you may. at times, not be able to follow your plan to leave room for some spontaneity (自发性) on your trip. Herein lies the beauty of traveling alone: You are your own master, and while preparation is key, there is always room for a change. One of the hardest parts of traveling in general is coming up with a list of what you’ll need to bring with you (or leave behind). Thinking of these all-important items becomes all the more difficult (and necessary) when you have no one else to rely on. (1) Carry a dictionary If you’re heading for a foreign country, don’t leave home without a bilingual (双语的) dictionary. Although a strong grasp of Czech will prove quite difficult, it is still important to learn phrases like "thank you", "hello", "please" and "I don’t know she charged money for her time", in case you’re in a disadvantageous situation. (2) Make copies of documents Make a copy of all essential travel documents such as your passport and health insurance to leave behind with someone you trust, in the event of an emergency. (3) Bring a credit card Along with cash, bring a credit card as an emergency method of payment and make sure to take note of your credit card company’s customer service line in case of loss or theft. That way, you can cancel your card immediately and have a new one delivered to you while on your trip (if possible). (4) Pack pleasure items A book to enjoy on a train ride or on the beach, a journal to record your experiences, and maps to educate yourself on the layout of the land (you can get these from a tourism bureau), can make a world of a difference. With these things in mind and a positive mindset, you are now officially ready to set out on your own. (1) Finally There You’ve taken the big step, said goodbye to family and friends, endured a long plane ride, and are finally in the place you dreamed of visiting.., until now. You might be quite overwhelmed by our new surroundings, but there are ways to control these feelings of over-stimulation. Instead of being an outsider looking in, try to transform yourself into a relaxed traveler who is not deterred by minor setbacks, such as long lines at the train station or delays in visiting hours of certain landmarks. If you planned accordingly, then you can afford to "waste" time at the busy tourist hotspots. Besides, you’re on vacation, and have nowhere to be! Another benefit of traveling alone is the ability to explore museums and engage in other time-consuming activities. There is no pressure to rush through exhibits or cut the visit short; pace yourself and take in the masterpieces, whether you’re an art lover or just an admirer. (2) Getting around Make an effort to walk everywhere--within reason, of course. This will help you get in touch with the area (so to speak) and observe the locals in their element. Using your legs also allows you to find attractively old-fashioned shops and cafes more easily than if you were on some splendid tour bus. Your goal should be to blend in, something a planned (and perhaps overpriced) tour won’t likely offer. Wear loose, light clothing because the more comfortable you feel, the more willing you will be to stay out an extra hour to explore a section you might have overlooked. Remain enthusiastic, relaxed and prepared, and the stories you will have to share upon your return will be priceless. Bring along a camera with lots of films. Leave your itinerary with someone at home, along with the numbers of each place you’re staying at. It’s okay if your plans are not so detailed, but if there is a big change in your plans, you might want to email the new information to your "in case of emergency" person back home. Stay safe and keep an eye out when it comes to money or your belongings; you don’t have a companion to catch the pickpocket creeping up from behind. While "carpe diem (及时行乐)" is important, so is safety. Be carefree, but don’t throw caution to the wind.What is the suggested reaction towards the setbacks on the trip A．Getting over-stimulatedB．Keeping yourself busyC．Feeling annoyedD．Relaxing yourself

Conversation TwoQuestions 12 to 15 are based on the conversation you have just heard.12.[A]It's an introductory course.[B]It's all filled up.[C]It has little room to improve.[D]It's a required course for his major.13.[A]It's only open to poetry majors.[B]It requires another class first.[C]It's already full.[D]It's only offered in the morning.14.[A]All the other work schedules conflict with his classes.[B]He doesn't want to ask his boss for another favor.[C ]He wants to work the same schedule as his friends[D]He likes to do his homework in the evening.15.[A]Its courses cost less.[B]It's close to where he works.[C]The class size is smaller.[D]It may offer the class he needs during the day.

Using many symbols makes ______ to put a large amount of information on a single map. 　 . A、 possible B、 it possibleC、 it is possibleD、 that possible

Secret codes （密码）keep messages private．Banks， companies， and government agencies use secret codes in doing business， especially when information is sent by computer． People have used secret codes for thousands of years．（1） ____ Code breaking never lags（落后） far behind code making．The science of creating and reading coded messages is called cryptography． There are three main types of cryptography． （2） ____ For example， the first letters of "My elephant eats too many eels" spell out the hidden message "Meet me．" （3） ____ You might represent each letter with a number， for example．Let's number the letters of the alphabet， in order， from 1 to 26．If we substitute a number for each letter， the message "Meet me" would read "13 5 5 20 13 5．" A code uses symbols to replace words， phrases， or sentences．To read the message of a real code， you must have a code book．（4） ____ For example， "bridge" might stand for "meet" and "out" might stand for "me．" The message "bridge out" would actually mean "Meet me．" （5） ____ However， it is also hard to keep a code book secret for long．So codes must be changed frequently．A．It is very hard to break a code without the code book．B．In any language， some letters are used more than others．C．Only people who know the keyword can read the message．D．As long as there have been codes， people have tried to break them．E．You can hide a message by having the first letters of each word spell it out．F．With a code book， you might write down words that would stand for other words．G．Another way to hide a message is to use symbols to stand for specific letters of the alphabet．

He said that two ________ would come to our school the next day.A. woman scientistsB. women scientistC. woman scientistD. women scientists