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病毒包涵体
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阅读下面这篇短文，短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为规定段每段选择1个正确的小标题；(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。 A new drug shows hope of conquering a form of leukemia by targeting the misbehaving cells two summers ago Douglas Jenson was so wiped out from battling chronic myelogenous(骨髓性的) leukemia(白血病) (CML) that he could do little more than sit by his window; watching the numbers on a thermometer rise and fall with the sun. Today thanks to an experimental drug called STI571 (brand name: Glivec), Jenson 67, is biking in Oregon and planning a trip to the Caribbean. "I feel wonderful," he says.2. So do his doctors. STI571, a "smart bomb" drug that targets leukemia cells without harming healthy ions, first made headlines last year when researchers announced that white blood counts had returned to normal in 31 out of 31 patients who had taken the pill. Last week scientists were hack reporting new data on just over 1000 patients. In one trial, more than 90 % of 532 people on the drug saw counts return to normal. And under microscopic examination, 28 percent showed no evidence of cancer left in their bone marrow.3. The drug even helped, although not as dramatically, some patients in the final "blast" phase of the disease, when survival is measured in months. STI571"has ignited the cancer-research field", says Dr Brian Druker, an Oregan Health Sciences University researcher who developed the drug with manufacturer Novartis.4. CML, diagnosed in 5100 Americans every year, is triggered when two chromosomes swap fragments of genetic information. CML starts with the mistaken swap of genes between two chromosomes. The resulting "Philadelphia chromosome" produces the mutant Bcr-Abl protein. Bcr-Abl transfers a phosphate from the chemical messenger ATP to other proteins. They initiate a flawed signal to white blood cells to replicate incessantly.5. STI571 returns blood counts back to normal for those patients with chronic myelogenous leukemia(CML) in a "smart bomb way" by targeting the protein that sends the message to make the white blood cells. Bone marrow transplants can work extremely well, but they’ re applicable only for a minority of patients; otherwise, standard treatment is the injectable drug interferon. Many patients, however, cannot tolerate the adverse effects, which include severe fatigue, weight loss and depression. The new pill works by deactivating the cancer cells’ growth signal. Side effects- nausea, eye puffiness, muscle aches have been relatively mild so far. Paragraph 4.______
目前我们用的最普遍的数据库是在文件系统基础上发展起来的一种______技术。
阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文章中没有提及，请选择C。 The temperature of the Sun is over 5,000 degrees Fahrenheit at the surface, but it rises to perhaps more than 16 million degrees at the center. The Sun is so much hotter than the Earth that matter can exist only as a gas, except at the core. In the core of the Sun, the pressures are so great against the gases that, despite the high temperature, there may be a small solid core. However, no one really knows, since the center of the Sun can never be directly observed. Solar astronomers do know that the Sun is divided into five layers or zones. Starting at the outside and going down into the Sun, the zones are the corona, chromosphere, photosphere, convection zones, and finally the core. The first three zones are regarded as the Sun’ s atmosphere. But since the Sun has no solid surface, it is hard to tell where the atmosphere ends and the main body of the Sun begins. The Sun’s outermost layer begins about 10,000 miles above the visible surface and goes outward for millions of miles. This is the only part of the Sun that can be seen during an eclipse such as the one in February 1979. At any other time, the corona can be seen only when special instruments are used on cameras and telescopes to shut out the glare of the Sun’s rays. The corona in brilliant, pearly white, filmy light, about as bright as the full Moon. Its beautiful rays are a sensational sight during an eclipse. The corona’ s rays flash out in a brilliant fan that has wispy spike-like rays near the Sun’s north and south poles. The corona is thickest at the Sun’s equator. The corona rays are made up of gases streaming outward at tremendous speeds and reaching a temperature of more than 2 million degree Fahrenheit. The rays of gas thin out as they reach the space around the planets. By the time the Sun’s corona rays reach the Earth, they are weak and invisible. Gases are main part in the corona rays.
Part ADirections: Read the following four texts. Answer the questions below each text by choosing A, B, C or D． Text 1 Cabinet meetings outside London are rare and reluctant things. Harold Wilson held one in Brighton in 1966, but only because the Labour Party was already there for its annual conference. In 1921 David Lloyd George summoned the Liberals to Inverness because he didn’t want to cut short his holiday. Gordon Brown’s decision to hold his first cabinet meeting after the summer break in Birmingham, on September 8th, was born of a nobler desire to show the almost nine tenths of Britons who live outside London that they are not ignored. He will have to do better: constitutionally, they are more sidelined now than ever. Many legislatures use their second chamber to strengthen the representation of sparsely populated areas (every American state, from Wyoming to California, gets two votes in the Senate, for example). Britain’s House of Lords, most of whose members are appointed supposedly on merit, has the opposite bias. A survey by the New Local Government Network (NLGN), a think-tank, finds that London and two of its neighbouring regions are home to more peers than the rest of Britain combined; even Birmingham, the country’s second-largest city, has just one. Oddly, this distortion is partly thanks to reforms that were supposed to make the Lords more representative. By throwing out most of the hereditary peers in 1999, Labour paved the way for a second chamber that was less posh, less white and less male than before. But in booting out the landed gentry, it also ditched many of those who came from the provinces. The Duke of Northumberland (270th in the Sunday Times’s " Rich List") may not be a member of a downtrodden minority. But Alnwick Castle, his family pile, is in the North-east region, home to just 2% of the Lords’ members now. Geographically speaking, the duke and his fellow toffs were champions of diversity. The government now wants to reintroduce some geographical fairness, but minus dukes. Long-incubated plans to reform the Lords would see it converted during the next parliament into a body that is mainly or entirely elected. A white paper in July outlined various electoral systems, all based on regional or sub-regional constituencies. Some would like to see the seat of government prised out of the capital altogether, though in the past this has normally required a civil war or a plague. Southerners whisper that no one would show up if Parliament were based in a backwater such as Manchester. But many don’t now. The NLGN found that peers resident in Northern Ireland vote least often. But next from the bottom are the London-dwellers, who show up for less than a third of the votes on their doorstep. Even the eight who live abroad are more assiduous. The north may seem an awfully long way away, but apparently so is Westminster. What is government’s measure in tackling such distortion
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