单选题The new dictionary is on the top shelf, out of ______ ． A．reach B．sight C．touch D．order

单选题Scientists are______certain that there is a cancer-inhibiting agent in the blood of the shark.

单选题He practiced ______ on her and managed to get $ 2, 000.

单选题From the article, we can deduce that the author ______.

单选题According to Olson, what is the reason for the poor economies of Third World countries?

单选题We are regretful ______ that the goods you have ordered are out of stock.

单选题If you buy more than ten, they will knock 20 pence off ______. A. a price B. price C. the price D. prices

单选题Every year gray whales migrate from the Bering Sea in Alaska to the Baja Peninsula in Mexico. Eleven gray whales have died in the San Francisco Bay in the last three weeks. No one knows why the whales are dying. Last year 270 whales died along the whales’ migration route. Many people think starvation is the cause. This year the dead whales seem to have more blubber (fat) on them. Twenty years ago, the gray whale was listed as an endangered species. Some scientists think that the larger number of whales makes it hard to find enough food. More whales create more pressure on the food supply, a supply that some scientists say may have dwindled as a result of the warm waters of El Nino. Most of the whales have been dead for many days before they are found and studied. This makes it hard to find the reason for death. 65 whales have been seen in the San Francisco Bay Area this year compared to 17 last year. The whales could be dying from many diseases, but it may be over-population.

单选题The microscope can ______ the object 100 times. [A] magnify [B] increase [C] develop [D] multiply

单选题How many people outside cities go into cities to look for jobs each day?

单选题This room ______ in the building.

单选题The school authority ______ against students' smoking both in the classrooms and at home.

单选题 The first time your boss suggests that you formally present something to your department or a client, your reaction may be panic. But remember that being asked to present is a compliment. Someone believes that you have valuable information to share with the group, and wants to listen to your ideas. You need to decide exactly what you will say during the allotted time. Condense your topic into one sentence. What do you want your audience to remember or learn from your talk? This is your 'big idea'. Remember that your are dealing with the short attention spans of individuals who tend to have many things on their minds. Think of three main points you want to make to support your overall topic. Develop a story to demonstrate each of those concepts. This could be something that happened to you or someone you know, or something you read in a newspaper or magazine. We have all heard the saying 'A picture is worth a thousand words.' Think about how your presentation can be more interesting to watch. Props are a wonderful way to make your talk come alive. You could do something as simple as holding up a toy phone receiver when talking about customer service or putting on a hat to signal a different part of your talk. Think of dynamic and unusual way to start your presentation. This might involve telling anecdotes that relate to your topic. Never begin with, 'Thank you for inviting me here to talk with you today.' You will put your audience to sleep right away. Start off enthusiastically so they will listen with curiosity and interest. After your energetic introduction, identify yourself briefly and thank the audience for taking the time to listen to you. Plan your ending, and finish in a memorable way. Your listeners remember best what they hear at the beginning and end of a speech, so conclude with a game in which they can participate, or tell a humorous story and your audience will leave laughing. Don't try to memories your talk or read it word-for-word. It will sound stilted and boring. Instead, practice your dynamic introduction and conclusion until you can deliver them effortlessly. If you do this you'll feel a burst of confidence that will help you sail through the whole of the speech.

单选题It is a myth that the law permits the Food and Drug Administration to ignore re quirements for______.drugs while brand-name drugs still must meet these rigid tests. A. specific B. generic C. intricate D. acrid

单选题We can draw a conclusion that ______. A．to continue to develop and improve computer networks is one of our aims in the near future B．the development of computers has already reached its peak C．electronic computers have hindered the development of molecular computers D．our society would have developed faster without computers

单选题The price of beer _____ from 50 cents to $4 per liter during the summer season.

单选题Many people believe the glare from snow causes snow blindness. Yet, dark glasses or not they find themselves suffering from headaches and watering eyes, and even snowblindness, when exposed to several hours of "snow light". The United States Army has now determined that the glare from snow does not cause snow-blindness in troops in a snow-covered country. Rather, a man's eyes frequently find nothing to focus on in a broad expanse of a snow-covered area. So his gaze continually shifts and jumps back and forth over the entire landscape in search of something to look at. Finding nothing, hour after hour, the eyes never stop searching and the eyeballs become sore and the eye muscle aches. Nature balances this annoyance by producing more and more liquid which covers the eyeballs. The liquid covers the eyeballs in increasing quantity until vision blurs. And the result is total, even though temporary, snowblindness. Experiments led the Army to a simple method of overcoming this problem. Scouts ahead of a main body of troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow-covered landscape. Even the scouts themselves throw lightweight, dark-colored objects ahead on which they too can focus. The men following can then see something. Their gaze is arrested. Their eyes focus on a bush and having found something to see, stop searching through the snow-blanketed landscape. By focusing their attention on one object at a time, the man can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a solid white area is overcome.

单选题The atmosphere is as much a part of the earth as ______ its soils and the water of its lakes, rivers and oceans. A. are B. is C. do D. has

单选题______, the workers continued their work in the open air.