单选题The English language contains a (an) ______ of words which are comparatively seldom used in ordinary conversation.

单选题Anxiety is believed to ______ diabetes by raising levels of the stress hormone cortisol which regulates insulin and blood-sugar levels. A. impede B. exacerbate C. inherit D. facilitate

单选题The manager needs an assistant who he can ______ to take care of problems in his absence.

单选题English and computer______two useful tools in preparing for one's career, we should do our best to have a good command of them.

单选题 The Health Benefits of Drinking Water —Is Bottled Drinking Water Healthier Than Filtered Tap Water? A. Water is a key ingredient in a healthy diet and lifestyle. There are many health benefits of drinking water. It helps flush impurities and toxins out of our systems. It aids in the delivery of oxygen and nutrients. In fact, nearly every system in our bodies relies on water for proper functioning. But what will happen if the water you drink is unhealthy? B. In past decades, concerns about tap water and its impact on overall health led some people to turn to bottled drinking water instead. However, in those days, there were few choices of bottled waters. You could pay to have a company deliver large bulky plastic bottles of water for the water cooler. Or you could purchase gallon jugs of distilled or 'drinking water' at the grocery store. C. In recent years, there has been an explosion in the number of different bottled waters available, with big distributors such as Coke and Pepsi jumping on the bandwagon. But are bottled drinking waters like Coke's Dasani brand, Pepsi's Aquafina, or Wal-Mart's store brand really any healthier than your tap water? Or would you be better off with a drinking water filtration system? D. As we have learned more about the water we drink, the technology behind drinking water filters and purification systems has improved dramatically. There are filters to remove impurities, chemicals, heavy metals, bacteria and most every contaminant you can think of. With the fight size and filter combination for your specific home, your water can be exceptionally pure and healthy. Cost Comparison E. Drinking water filtration systems have also become more affordable and easy to use. Although the initial cost of a whole house system usually amounts to several hundred dollars, that cost is often less than $100 each year if spread out over the life of the system. There may be additional expenses to replace carbon filters, membranes in reverse osmosis drinking water filtration system, or lamps in an ultraviolet light water treatment device. These expenses can add another $100 or so to the annual costs of operating drinking water filters and purification systems. F. While some people may hesitate to spend so much each year for clean, safe drinking water, they are probably paying more for bottled drinking water. Calculations show that at a price of $1 to $4 per gallon, bottled or delivered water costs an average of $400 each year, especially if you purchase individual bottles. And that doesn't take into consideration the gas needed to drive to the store or the environmental impact of all the empty plastic bottles. Health Aspects G. Many people who choose bottled drinking water understand that it is more expensive, but they are still willing to pay the extra money because bottled water is thought to be safer and healthier than filtered drinking water. After all, bottled water is often marketed as 'natural spring water' or 'pure glacier water.' H. In reality, few bottled waters come from natural springs, and most of them use municipal tap water. The companies are able to get away with this false marketing because the regulations and standards for bottle drinking water are less stringent than those for residential drinking sources. I. The quality of bottled water is regulated by the Food and Drug Administration (FDA), while drinking water systems are typically regulated by State regulations or the Environmental Protection Agency (EPA). This doesn't mean that the FDA isn't doing their job. It's just that the rules for bottled water only require it to be as good as tap water, not better. J. In addition, the FDA regulations only apply to bottled drinking water that is transported across state lines. If a company sells their bottled drinking water in the same state where it was bottled, the federal regulations don't apply. The result is that many bottled waters are not any healthier than filtered water, and in fact some are less pure. K. This was demonstrated in a study which was conducted in 1999 by the Natural Resources Defense Council. They tested over 100 brands of bottled drinking water and found that about one third of the waters contained contamination in the form of chemicals, bacteria, and arsenic. The study also found that up to forty percent of bottled drinking waters come from a city water system. How to Tell if Your Water Is Healthy L. So how do you tell if the water you are drinking is healthy? With tap water, it is relatively easy. If you water comes from a municipal source, the suppliers are required by law to provide annual water quality reports. If you have a well, you can have an authorized lab test your water. It may cost $100 or more, but it's a small price to pay for peace of mind. Or you can purchase a kit and test it yourself, but naturally the results may not be as conclusive or reliable as those produced by authorized labs. M. When it comes to bottled drinking water, it can be more difficult to know what you are getting. Start by checking the label or the bottle cap. Some may tell you that the water comes from a municipal source or 'community water system', which means tap water. N. If the label doesn't give any information, you can call the bottler and ask. But don't be surprised if you get the run around and are transferred to several different departments. Some states have a bottled water program that tracks bottled drinking water and can tell you the origin of the source water as well as other information. O. Safe and healthy drinking water has become big business. Thousands of companies are vying for your hard earned cash, and some are not always honest about what their products offer. The initial investment for a home drinking water filtration system can seem expensive at first, but over time, it is usually less expensive than bottled drinking water. And with a water filter, you at least know where the water you drink came from and how it was treated. P. Before going out and spending your hard earned money for bottled drinking water that may, be no better than your own tap water, it is obviously a good idea to do some research. You are likely to decide that a drinking water filtration system and/or purifier is the healthier choice and provides the best value as well.

单选题I was reading Shirley Hazzard''s novel The Transit of Venus. Though I 【1】 her other books, I had always resisted this one. It 【2】 me as too pure somehow, too heroic, larger or finer than life and therefore unreal. But now I read it with an almost 【3】 pleasure. There were sentences that 【4】 of gratification to my eyes and 【5】 the hairs on the nape of my neck. I was in a Boston hospital, propped tip in bed with a feeding tube in my arm after 【6】 surgery for cancer. It was 【7】 double room and my roommate, who 【8】 when he spoke because he had both a broken chin and a drug habit was spraying the air for the fourth or fifth time that day with 【9】 . He had a television set and a radio going 【10】 . The diagnosis of my case was ambiguous. When I asked the doctor the usual question—How much time have I got?—he hesitated before answering. "I would say," he said, "that you have in the neighborhood of years."

单选题Researchers at Children's Hospital of Pittsburgh announced they had discovered ______ evidence that a virus is involved in what used to be called juvenile diabetes.

单选题Most engineers were ______ about the effectiveness of the new model of word-processors.

单选题 The local newspaper has a ______ of 10,000 copies a day.

单选题Hangzhou is really a beautiful city

单选题The main thought of this passage is that anger ______.

单选题The professor gave ______ instruction to the whole class so as to make every student understand how to conduct the experiment in the lab.

单选题Sign has become a scientific hot button. Only in the past 20 years have specialists in language study realized that signed languages are unique—a speech of the hand. They offer a new way to probe how the brain generates and understands language, and throw new light on an old scientific controversy： whether language, complete with grammar, is something that we are born with, or whether it is a learned behavior. The current interest in sign language has roots in the pioneering work of one rebel teacher at Gallaudet University in Washington, D.C., the world"s only liberal arts university for deaf people. When Bill Stokoe went to Gallaudet to teach English, the school enrolled him in a course in signing. But Stokoe noticed something odd: among themselves, students signed differently from his classroom teacher. Stokoe had been taught a sort of gestural code, each movement of the hands representing a word in English. At the time, American Sign Language (ASL) was thought to be no more than a form of pidgin English (混杂英语). But Stokoe believed the "hand talk" his students used looked richer. He wondered: Might deaf people actually have a genuine language? And could that language be unlike any other on Earth? It was 1955, when even deaf people dismissed their signing as "substandard". Stokoe"s idea was academic heresy(异端邪说). It is 37 years later. Stokoe—now devoting his time to writing and editing books and journals and to producing video materials on ASL and the deaf culture—is having lunch at a cafe near the Gallaudet campus and explaining how he started a revolution. For decades educators fought his idea that signed languages are natural languages like English, French and Japanese. They assumed language must be based on speech, the modulation (调节) of sound. But sign language is based on the movement of hands, the modulation of space. "What I said," Stokoe explains, "is that language is not mouth stuff—it"s brain stuff. " (340 words)

单选题 I like to go to the cinema when I am in the ______ for it.

单选题Police have _____ to the public to come forward with any information which might help them in their inquiries.

单选题Last night I was so tired that I forgot to ______ my watch and it stopped at twelve.

单选题 中国新颁布的老年人保护法(elderly protection law)规定，成年子女必须看望他们年迈的父母。年迈的父母如果感觉被子女忽视了，可以把他们已成年的孩子告上法庭。但是，法律没有说明子女必须看望父母的频率。法律中也没有说如何执行这项法律、忽略长辈如何惩罚。一位帮助起草老年人保护法草案的教授说，立法主要是为了提高人们对于老年人情感支持需要的意识。

单选题As ______ announced in today's papers, the Shanghai Export Commodities Fair is also open on Sundays. A. being B. is C. to be D. been

单选题I am not convinced that this argument is particularly good news for elders who may be 【1】 to enjoy the time of their lives. What maybe good news is perhaps best forgotten by those who are 【2】 on from day to day, and getting by as best they 【3】 . Causation is itself an 【4】 matter for the unscientific mind. Which would you rather feel: that your cancer has been genetically 【5】 , induced by stress or caused by viruses? Brought about by your own folly in smoking cigarettes, as Kirkwood himself appears to take 【6】 granted—brought about casually and spontaneously through the operation of chance? If it is put before them in this way, most people would rather not think about the matter at all. Kirkwood takes a different view, maintaining that the more we know about the 【7】 process, the more we can " 【8】 a greater degree of personal control". Common sense certainly tells us oldies to take it easy, to cut 【9】 a bit on food and alcohol and strenuous exercise, but we know this from the feel of our 【10】 rather than from what we read about the progress of science.