【正文】 he sunlight energy not to store starch, but to make hydrogen. Ghirardi says. For example, algae will produce hydrogen in an air free environment. It39。這種方式不能切實(shí)可行的生產(chǎn)廉價的能源。s a lot of flexibility in how you can use these anisms. 研究人員們希望，總有一天藻類會成為很容易使用的燃料來源。迪克森說?，F(xiàn)在，迪克森的團(tuán)隊已發(fā)明了一種儀器，它在一個山坡內(nèi)的顆粒開始移動時可以接收到振動。 Locations with a significant risk of landslides could definitely benefit from a machine like this, says Adam Poulter, an expert at the British Red Cross. As long as it doesn39。 ―被研究者的情況說明大約 95%患以上四種癌癥的原因就是抽煙或飲酒。 People in the highestconsumption group who drank only with meals had 10 times the risk of oral cancer, 7 times the risk of pharyngeal cancer, and 16 times the risk of esophageal cancer pared with those who averaged 20 or fewer drinks a week with meals. In contrast, laryngeal cancer risk the highintake, withmealsonly group was only triple that in the lowintake consumers who drank with meals. 和每周只在就餐時平均飲酒至多 20杯的人相比，高飲酒量組的人在就餐時間飲酒患口腔癌的危險是低飲酒量組的 10 倍，咽癌是其 7 倍，食道癌 16倍。s Titan 土衛(wèi)六上發(fā)現(xiàn)了生命跡象 Scientists say they have discovered hints of alien life1 on the Saturn39。這就證明在這個不及半個地球大小的衛(wèi)星表面有某種微生物在依靠 氫氣生存。 Scientists had expected the Sun39。 ‖ 1 .What have scientists found about Saturn?科學(xué)家發(fā)現(xiàn)了關(guān)于土星的什么現(xiàn)象？ C They have found methanebased life on Titan.他們在土衛(wèi)六上發(fā)現(xiàn)了靠甲烷為生的生命體。每年上百萬的克隆小雞能被孵化出來，從而為雞場提供以相同比例生長，重量相同并且味道相同的小雞。re laid. The trick is to culture8 the cells without them starting to distinguish, so they remain pluripotent, says Fitzgerald. 那好像并沒有讓使家禽養(yǎng)殖業(yè)氣餒，然而，他們想使抗痛小雞吃得更少，長得更快， ―養(yǎng)殖者希望減少 投 入 但 仍 獲 得 相 同 的 產(chǎn)量， ‖MikeFitzgeraldofOrigen 說，為了達(dá)到這個要求， Origen 致力于 ―制造一個有效克隆體的小雞， ‖他說，正常的克隆技術(shù)對鳥類無效，因?yàn)槁巡荒鼙灰苿踊蛞浦病?yán)格地說，嵌合體的小雞不是克隆雞，因?yàn)樗扔兄踩氲募?xì)胞又有本身的細(xì)胞。 If these girls keep getting mathanxious female teachers2 in later grades, it may create a snowball effect on their math achievement3 said Levine. In other words,girls may end up learning math anxiety from their teachers4. The study suggests that if these girls grow up believing that boys are better at math than girls are,then these girls may not do as well as they would have if they were more confident. 如果一直由對數(shù)學(xué)有焦慮的女教師教授數(shù)學(xué)，就會對她們的數(shù)學(xué)成績產(chǎn)生雪球效應(yīng) ， Levine 說。學(xué)生們在學(xué)年的開始和結(jié)束時都進(jìn)行數(shù)學(xué)測試，研究者們比較得分。 In future, Origen imagines freezing stem cells from different strains of chicken13. If orders e in for a particular strain, millions of eggs could be produced in months or even weeks. At present, maintaining all the varieties the market might call for is too expensive for breeders, and k takes years to breed enough chickens to produce the billions of eggs that farmers need. 在將來，Origen 設(shè)想將不同品種小雞的干細(xì)胞冷凍，如果定單要某一種小雞，成百萬的卵能在幾個月甚至幾個星期被生產(chǎn)出來，目前， 維持市場可能需要的各種小雞對養(yǎng)殖者來說太昂貴了，那要花數(shù)年的時間培育足夠多的小雞以生產(chǎn)出農(nóng)民需要的上百萬雞蛋。t matter if it39。t work in birds because eggs can39。美國的公司正在開發(fā)一項(xiàng)需要大規(guī)模克隆小雞的技術(shù)。 Scientific conservatism suggests that a biological explanation should be the last choice after all nonbiological explanations are addressed,Allen said. We have a lot of work to do to rule out8 possible nonbiological explanations. It is more likely that a chemical process,without biology,can explain these results. Allen 說： ―科學(xué)界的保守主義者們建議，要做出土衛(wèi)六上有生物的結(jié)論，首先必須對土衛(wèi)六上所有沒有生物的觀點(diǎn)做出 回應(yīng)；要排除土衛(wèi)六上可能沒有生物的觀點(diǎn)，我們?nèi)沃氐肋h(yuǎn)。在土衛(wèi)六上，絕對溫度達(dá)到 90度 (相當(dāng)于攝氏 273． 15 度 )，依賴于甲烷的微生物不得不用某種液體物質(zhì)作為生存的介質(zhì)，這種液體不是水，水在土衛(wèi)六上會凍成冰塊，不能融化。 They argue that hydrogen gets absorbed before hitting Titan39。 1. Researchers have found that the risk of cancer in the mouth and neck is higher with people 口腔與頸椎癌癥的高危人群是 A. who drink alcohol outside of meals. 就餐時間外飲酒 2. Which of the following is NOT the conclusion made by the researchers about ―drinking with meals‖?哪一個不是研究者關(guān)于就餐飲酒的情況？ C. It increases by 20 percent the possibility of cancer in all sites. 癌癥幾率增加 20% 3. Approximately how many drinks do the lowestintake group average per day? 每天酒精最低攝入量是？ A. 3 drinks. 4. Which cancer risk is the lowest among all the four kinds of cancer mentioned in the passage?在這里患哪種癌的幾率最低？ B. Laryngeal cancer喉癌 5. According to the last paragraph, tissue39。例如，和低飲酒量的人相比，每周飲酒 21~34 杯的人患除喉癌以外其他部位的癌癥的危險增加了一倍。 After the researchers accounted for the amount of alcohol consumed, they found that individuals who downed a significant share of their alcohol outside of meals faced at least a 50 to 80 percent risk of cancer in the oral cavity, pharynx, and esophagus, when pared with people who drank only at meals. Consuming alcohol without food also increased by at least 20 percent the likelihood of laryngeal cancer. ―Roughly 95 percent of cancers at these four sites traced too smoking or drinking by study volunteers,‖ Dal Maso says. The discouraging news his team reports, is that drinking with meals didn‘t eliminate cancer risk at any of the sites. 在研究者分析了飲酒的總量后，他們發(fā)現(xiàn)和只在就餐時飲酒的人相比，在就餐時間以外灌下大量烈酒的人面臨至少 50%~80%的患口腔癌、咽癌和食道癌的危險。先期結(jié)果顯示它比現(xiàn)有的儀器提供較少的判斷誤差。可是，山坡改變形狀也未必就導(dǎo)致山崩。 Landslides start when a few particles of soil or rock within a slope start to move, but the early stages can be hard to spot. Following this initial movement, slopes can bee unstable in a matter of hours or minutes, says Nell Dixon at Southborough University1, UK. He says a warning system that monitors this movement might be enough to evacuate a block of flats or clear a road, and save lives. 當(dāng)同一個山坡上的一些土壤或石塊開始移動時，山崩就開始了，但早期很難發(fā)現(xiàn)。隨著工作量的加大，他們可以加速細(xì)胞的活動，從而產(chǎn)生大量的氫氣。 Working in an air free environment, however, is difficult. It39。她正想方設(shè)法的通過植物的產(chǎn)生氫來取代光合作用產(chǎn)生的糖。s why scientists are taking a closer look at exactly how plants do it. 綠葉植物細(xì)胞的工作就像微型加工廠一樣，將陽光，二氧化碳和水轉(zhuǎn)化為糖和淀粉，并且同時儲存植物本身所需的能量。 expression below is opposite in meaning to the word shrink appearing in paragraph 5 ? 那個詞可以和第 5 段中的 ―shrink 收縮 ‖表達(dá)意思相反 . 膨脹 of the following is true of Belcher‘s battery mentioned in paragraph 6? 6 段中提到的Belcher‘s battery哪個描