单选题The travelers were ready to enjoy the spectacular tidal waves when suddenly a thick fog came up and obscured the whole scene.

单选题It is difficult to assess the importance of the decision.

单选题The dragon - boating day is ______ the death of Qu Yuan, the great poet in china.A. in accordance withB. in terms ofC. in favor ofD. in honor of

单选题Business Markets Are Big Business Internationally Business-to-business marketing is a significant economic activity internationally, as well as in the domestic U. S economy. Consider the following list of the largest exporting companies in the United States, ranked export sales volume in 1998: 1. General Motors. 2. Ford Motor Company. 3. Boeing (aircraft). 4. General Electric. 5. IBM. 6. Chrysler Motors. 7. Du Pont. 8. Mcdonnell Douglas(aircraft). 9. Caterpillar (earth-moving equipment). 10. United (earth-moving equipment). Seven of the top 10 firms export products to end users in the business market. Only the three auto firms market products for which some end users are household consumers. And even in these cases, the products first are exported to the business reseller market (wholesalers and retailers) in various parts of the world. Exporting by U. S. firms to international business markets increased during the 1980s, and this upward trend is likely to continue throughout the 1990s. In the early 1980s, for example, USX, the nation"s largest steel producer, abolished its export sales unit. Then near the end of that decade, the company assembled a new overseas sales them and exported 1 million tons of steel in 1989. POM. a small manufacturer of parking meters in Arkansas, has a larger market share overseas than at home. The firm sells to city governments in such farflung(遥远的) places as Malaysia, Chile, and Holland. And recently POM introduces its first solar—powered parking meter in Shepparton, Australia. The Mead Corp. Spent $550 million to expand and Alabama mill that produced coated paperboard(卡纸板), with the intent of exporting half of the plant"s output. The Mazda auto company planned to ship to Japan in one year $100 million of North American made auto parts. Business-to-business international marketing is not limited to physical products. Many service firms are finding very attractive business markets in foreign countries. Law firms and management consulting firms are setting up offices in Japan, Western Europe, and Russia. in the field of financial services. Japan"s huge banks are making significant inroads in the U. S. market. Some Japanese officials forecast that these bands could increase their share of the U.S. commercial bank market to 25 percent by the mid-1990s. Truly, the scope of international trade involving business markets is huge and is continuing to grow. The range of business goods and services that can be marketed internationally seems almost limitless.

单选题The staff of the company are always courteous and helpful.

单选题It is advisable to see a dentist regularly.A. frighteningB. terribleC. wiseD. beneficial

单选题Smoking is not permitted in the office.

单选题The word “sustainable” in the last paragraph is closest in meaning to _______ .

单选题The construction of the railway is said to have been {{U}}terminated{{/U}}.

单选题It is easy to misjudge the Ustrength/U of the wind.

单选题I am not certain whether he will come. A. determined B. sure C. sorry D. glad

单选题In some libraries young people can check out ten juvenile books at one time.A. adventureB. large printC. hardcoverD. children's

单选题One of the newer conservation projects undertaken by the state of Oklahoma involves flood prevention.

单选题Life Expectancy in the Last Hundred Years A hundred years ago, life expectancy in developed countries was about 47; in the early 21st century, men in the United States and the United Kingdom can expect to live to about 74, women to about 80, and these (51) are rising all the time. What has brought (52) these changes? When we look at the life (53) of peoplel00 years ago, we need to look at the greatest (54) of the time. In the early 20th century, there were the acute and often (55) infectious diseases such as smallpox. Many children died very young from these diseases and others, and the weak and elderly were always at risk. In the (56) world these diseases are far (57) today, and in some cases have almost disappeared A number of (58) have led to this: improvements in sanitation and hygiene, the discovery and use of antibiotics, which (59) bacterial diseases much less dangerous, and vaccinations (60) common diseases. (61) , people's general health has improved with improvements in our general environment: cleaner air, better means of preserving food, better and warmer housing, and better understanding of nutrition. Genetically, we should all be able to live to about 85 but (62) people do live longer today, there are still some big killers around that are preventing us from consistently reaching that age. The problems that affect people today are the more chronic illnesses, such as heart disease and strokes, and those (63) by viruses, such as influenza and AIDS. Of course, cancer is a huge killer as well. In most cases these diseases affect (64) people, but there are worrying trends in the developed world with problems such as obesity (65) more heart disease and illnesses such as diabetes at younger ages. The killers today can be classed as "lifestyle diseases", which means that it may be possible to halt their progress.

单选题Dr. Anne Schuchat, director of the CDC's National Center for Immunization and Respiratory Diseases, says the CDC's emphasis on hand -washing is guided by the" science that supports hand-washing against respiratory infections in general. "In particular, she cites a study conducted in Pakistan that showed that hand hygiene measures cut the rate of pneumonia in half. One of the unique features of swine flu - the fact that it causes diarrhea- also suggests to some that it could be transmitted on the hands like other diarrhea - causing diseases that do not belong to the influenza family. Schuchat stresses that the best way to protect yourself will be to get the vaccine once it becomes available in October, but adds that the CDC continues to believe that "contact precautions are useful with this flu. " According to SchuchatA. hand-washing is useful with H1N1 flu.B. the only way to protect one against H1N1 is to get the vaccine.C. the emphasis on hand -washing has no scientific ground.D. hand - washing can only reduce the rate of pneumoni

单选题These programmes are of immense value to old people.

单选题Diabetes (糖尿病) and Eye Damage Over 2 million Canadians have diabetes. It is the leading cause of blindness in North Americans under 65 years of age. Diabetes is a condition where the body either cannot produce enough insulin (胰岛素) or cannot respond properly to insulin. Insulin is important because it moves glucose (葡萄糖), a simple sugar, into the body"s cells from the blood. The food people eat provides the body with glucose, which is used by the cells as a source of energy. If insulin isn"t available or doesn"t work correctly to move glucose from the blood into the cells, glucose will stay in the blood, leading to high blood sugar levels. High blood sugar levels damage the blood vessels, including the tiny blood vessels in the eye. This leads to an eye disease known as diabetic retinopathy (糖尿病型视网膜病). The retina (视网膜) is an area at the back of the eye that changes light into nerve signals. With diabetic retinopathy, some blood vessels in the retina are lost, and some of the other blood vessels begin to "leak" blood. This causes the retina to swell and gradually cuts off its supply of oxygen and nutrients (滋养物). Eventually, the retina starts to grow new blood vessels to replace the damaged ones. Unfortunately, these new vessels are not as strong as the old ones. They are more likely to break, causing bleeding in the eye. At first, people with diabetic retinopathy will not notice any symptoms. As the disease gets worse, they may notice blurred (模糊的) vision, black spots or flashing lights. As time goes on, it can progress to blindness. Everyone with diabetes is at risk for diabetic retinopathy, and the risk increases the longer you"ve had diabetes. Fortunately, you can reduce your risk if you do not have diabetes, but think you may be at risk for this condition. Visit your doctor to be screened for diabetes. If you do have diabetes: have frequent eye check-ups. Make sure that you monitor your blood sugar frequently and use your medications as recommended by your doctor. There is evidence to show that keeping your blood sugar under tight control can slow down eye damage. If you have high blood pressure, follow your recommended diet and medications to keep it under control. If you are not sure whether you have high blood pressure, or whether your blood pressure is under control, discuss this with your doctor.

单选题Hearing problems may be {{U}}alleviated{{/U}} by changes in diet and exercise habits

单选题CT Scans and Lung Cancer Small or slow-growing nodules (小结节) discovered on a lung scan are unlikelv to develop into tumors over the next two years, researchers reported on Wednesday. The findings reported in the New England Journal of Medicine , could help doctors decide when to do more aggressive testing for lung cancer. They could also help patients avoid unnecessarily aggressive and potentially harmful testing when lesions (损伤) found. Lung cancer, the biggest cancer killer in the United States and globally, is often not diagnosed until it has spread. It kills 159,000 people a year in the United States alone. The work is part of a larger effort to develop guidelines to help doctors decide what to do when such growths, often discovered by accident, appear in a scan. High-tech (高技术的) X-rays called CT scans can detect tumors—but they see all sorts of other blobs (模糊的一团) that are not tumors, and often the only way to tell the difference is to take a biopsy (活检), a dangerous procedure. At the moment, routine lung cancer screening is considered impractical because of its high cost and because too many healthy people are called back for further testing. Good guideline could help make lung cancer screening practical, Dr. Rob van Kiaveren of the Erasmus Medical Center in Rotterdam, the Netherlands, who led the new study, said in a telephone interview. The team looked at 7,557 people at high risk for lung cancer because they were current and former smokers. All received multidetector (多层螺旋) CT scans that measured the size of any suspicious-looking modules. Volunteers who had nodules over 9.7 mm in width, or had growth of 4.6 mm that grew fast enough to more than double in volume every 400 days, were sent for further testing. Of the 196 people who fell into that category, 70 were found to have lung cancer, 10 additional cases were found years later. But of the 7,361 who tested negative during screening only 20 lung cancer cases later developed. In a second round of screening done one year after the first, 1.8 percent were sent to the doctor because they had a nodule that was large or fast-growing. More than half turned out to have lung cancer. The result means that if the screening test says you don"t have lung cancer, you probably don"t, the researcher said. "The chances of finding lung cancer one and two years after a negative first-round test were 1 in 1,000 and 3 in 1,000 respectively," they concluded.

单选题You can easily find out the benefits of {{U}}flexible{{/U}} working for both you and your employer. A. loose B. effective C. elastic D. resourceful