单选题______ manifest various grammatical relations or grammatical categories such as number, tense, degree and case.

单选题They kept me ______ for more than an hour.

单选题—I wonder______Mr. Black changed his mind to take part in the movement.—After he listened to the speech by Mr. King.

单选题Speak louder, ______you won't make yourself heard in such a big room. A. but B. and C. or D. for

单选题"I have great confidence that by the end of the decade we'll know in vast detail how cancer cells arise," says microbiologist Robert Weinberg, an expert on cancer. "But," he cautions, "some people have the idea that once one understands the causes, the cure will rapidly follow. Consider Pasteur, he discovered the causes of many kinds of infections, but it was fifty or sixty years before cures were available." This year, 50 percent of the 910,000 people who suffer from cancer will survive at least five years. In the year 2000 , the National Cancer Institute estimates, that figure will be 75 percent. For some skin cancers, the five-year survival rate is as high as 90 percent. But other survival statistics are still discouraging — 13 percent for lung cancer, and 2 percent for cancer of the pancreas. With as many as 120 varieties in existence, discovering how cancer works is not easy. The researchers made great progress in the early 1970s, when they discovered that oncogenes, which are cancer-causing genes, are inactive in normal cells. Anything from cosmic rays to radiation to diet may activate a dormant oncogene, but how remains unknown. If several oncogenes are driven into action, the cell, unable to turn them off, becomes cancerous. The exact mechanisms involved are still mysterious, but the likelihood that many cancers are initiated at the level of genes suggests that we will never prevent all cancers. "Changes are a normal part of the evolutionary process," says oncologist William Hayward. Environmental factors can never be totally eliminated; as Hayward points out, "We can't prepare a medicine against cosmic rays." The prospects for cure, though still distant, are brighter. "First, we need to understand how the normal cell controls itself. Second, we have to determine whether there are a limited number of genes in cells which are always responsible for at least part of the trouble. If we can understand how cancer works, we can counteract its action."

单选题The passage mainly discusses_______

单选题America has now adopted more ______ European-style inspection systems, and the incidence of food poisoning is falling.(2014年厦门大学考博试题)

单选题Ms Beecher decided to expand her Chapter-A-Day service because ______.

单选题{{B}}Directions:{{/B}} Below each of the following passages you will find some questions or incomplete statements. Each question or statement is followed by four choices marked A, B, C and D. Read each passage carefully, and then select the choice that best answers the question or completes the statement. Mark the letter of your choice with a single bar across the square brackets on your Machine-scoring Answer Sheet.{{B}}Passage One{{/B}} Small, pink and very ugly. Hardly the qualities of a star, but they describe the deformed mouse that was the media darling at a recent science exhibition in Beijing. With a complex tissue structure in the shape of a human ear grafted on to its back, the rosy rodent was a stunning symbol of the serious strides China is making in the field of biotechnology. China is fast applying the latest life-science techniques learned from the West m aggressively pursue genome research. It's establishing its own centers of technical excellence to build a scientific base to compete directly with the United States and Europe. With a plentiful supply of smart young scientists at home and lots of interest abroad biotechnology is on the brink of a boom in China and in the view of foreign scientists, Beijing is playing a clever hand, maximizing the opportunities open to them. For the moment, the cooperation exists mostly with Europe and the U. S. But Asia's other biotech leaders, Japan, Singapore and Korea, also are recognizing China's potential as an attractive low-cost base to conduct research. These partnerships--and China's advancement in the field of biotechnology--could help benefit the rest of Asia: China's rapid progress in improving crop yields will address food-security concerns in the region. In addition, China is more likely to focus on developing cheap technology that its predominantly poor population--and those of other Asian countries--can afford. There remain, however, serious barriers to the development of a strong biotech industry. Among them are a poor domestic legal framework, weak enforcement of intellectual-property rights and loose adherence to international standards. China is a signatory of the International Bio Safety Protocol, which should mean adherence to global standards governing the conduct of field trims. But some observers are skeptical. "The regulations look good, but I haven't met one scientist who believes they are being fully adhered to," says a European science analyst. If shortcuts are taken, then some of the recent scientific achievements trumpeted in the official press may never make it to market. But no matter how strict lab tests are, other problems lie in wait. For example, there is a number of tasks it would take years to fulfill in the patents office, says one lawyer, leaving innovators with little protection if they take a product to market in China.

单选题Mr. White______ for the teacher who was in hospital.

单选题{{B}}Text 3{{/B}} Few beyond California's technology crowd recognise the name Larry Sonsini; none within its circle could fail to. For four decades he has been lawyer, adviser and friend to many prominent companies and investors. Some consider him the most powerful person in Silicon Valley. Companies beg for his law firm to represent them. The 65-year-old chairman of Wilson Sonsini Goodrich and more recently, as outside counsel to Hewlett-Packard (HP), for initially defending the board's dubious investigative practices. WSG&R boasts 600 lawyers and represents around half of Silicon Valley's public companies, including Apple, Sun Microsystems and Google. Last year it ranked first in private-equity and venture-capital deals, with nearly twice as many as its closest rival. Over the past five years WSG&R has worked on over 1,000 mergers and acquisitions, collectively worth over $260 billion. The recent troubles cast a shadow over WSG&R's reputation. Although Mr. Sonsini is not accused of wrongdoing himself, many of his firm's clients are on the ropes. Former executives at Brocade Communications suffered criminal charges in July. Mr. Sonsini served on Brocade's board until last year and his firm was its outside counsel. He also was on the boards of Pixar, Echelon, Lattice Semiconductor, LSI Logic and Novell-all firms at which the issuing of stock options is being called into question. WSG&R dismisses the idea that Mr. Sonsini faced a conflict of interest by acting as both director and legal adviser to so many firms and says he did not advise HP in its investigation of board members. Mr. Sonsini initially said it was "well done and within legal limits". It now seems it was neither.

单选题Bob: Can I help with your luggage? Mary: ______ A. No, thanks. I can manage it. B. No, many thanks. I can do. C. No, not necessary. Thank you anyway. D. No, you needn't. Thank you anyway.

单选题Last year Mike earned ______ his brother did, who has a better position. A. twice as many as B. twice as much as C. twice than D. twice as more as

单选题 通读下面的短文，掌握其大意。然后，从每小题的四个选项中选出可填入相应空白处的最佳选择。 Milk was one of the main foods for people long before history was written. Maybe {{U}}(21) {{/U}} will remain an important food as long as there are {{U}}(22) {{/U}} that give milk. The old word "milk" {{U}}(23) {{/U}} Sanskrit(梵文), one of the oldest {{U}}(24) {{/U}} known to man. A very old picture of milking, {{U}}(25) {{/U}} was drawn five thousand years ago, has been found. In the years long ago, people got their milk {{U}}(26) {{/U}} their own animals. But {{U}}(27) {{/U}} modern times new inventions made the milk industry(产业) a big business. {{U}}(28) {{/U}} 1851 Gall Borden found a way to {{U}}(29) {{/U}} some of the water out from milk. This made milk keep longer. Four years later, Louis Pasteur {{U}}(30) {{/U}} a way to kill the bacteria(细菌) in milk. Then a special milk bottle was made. This was followed {{U}}(31) {{/U}} the invention of machines that could fill bottles with milk. The discoveries had a great effect(影响) on the milk industry. They meant that milk could be kept longer. Some people believe that milk drinking will become less popular {{U}}(32) {{/U}} it has been. But remember how long milk has been an important food {{U}}(33) {{/U}} think of the many ways {{U}}(34) {{/U}} it is useful. It seems {{U}}(35) {{/U}} to say that the milk industry will always be important.

单选题This book is not mine. It belongs to ______.A. heB. hisC. himD. himself

单选题No matter ______ hard it may be, I will carry it out.A. whatB. whateverC. howD. however

单选题The final examination is coming up soon. It's time for us to ______ our studies.A. get down toB. get outC. get back forD. get over