【正文】 your hair on a piece of white paper and try to see how wide your hair ispretty thin，right? Although the width of each person‘s hair is a bit different， you could probably fit about 10 of these virusbuilt battery parts， side to side， across one hair. These microbatteries may change the way we look at viruses7. 這些電池部件到底有多小呢？從頭上拔一根頭發(fā)，把它放到白紙上，看看頭發(fā)的寬度 ——是不是很細(xì)呢？盡管每個(gè)人的頭發(fā)寬度不同，每個(gè)頭發(fā)上可以并列排放大約 10個(gè)病毒電池部件。 expression below is opposite in meaning to the word shrink appearing in paragraph 5 ? 那個(gè)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(gè)描述是真的 is a metallic disk with viruses inside it. 它是指由病毒構(gòu)成的金屬圓盤。但是植物當(dāng)屬應(yīng)用太陽能的專家：十億年來，植物一直把陽光作為能源資源。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(shí)儲(chǔ)存植物本身所需的能量。 Some scientists are trying to get plants, or biological cells that act like plants, to work as miniature photosynthetic power stations. For example, Mafia Ghirardi of the National Renewable Energy Laboratory in Golden, Colo. 2, is working with green algae3. She39。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。在光合作用下，植物通常產(chǎn)生糖類或淀粉。 Working in an air free environment, however, is difficult. It39。 Unfortunately, removing the sulfate also makes the algae39。隨著工作量的加大，他們可以加速細(xì)胞的活動(dòng)，從而產(chǎn)生大量的氫氣。奇若蒂說，： ―你可以將它放在一反應(yīng)堆或是池塘里，也可以在海洋中找到它們，人們可以靈活的使用藻類的用途廣泛。 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(gè)山坡上的一些土壤或石塊開始移動(dòng)時(shí)，山崩就開始了，但早期很難發(fā)現(xiàn)。 The most mon way to monitor a slope for signs of an imminent landslide is to watch for changes in its shape. Surveyors can do this by measuring aside directly, or sensors sunk into boreholes or fixed above ground can be used to monitor the shape of a slope. Slopes can. however, change shape without triggering a landslide, so either method is prone to causing false alarms. Now Dixon39?？墒牵狡赂淖冃螤钜参幢鼐蛯?dǎo)致山崩。鉆孔中儀器的四周填滿沙礫，有助于傳導(dǎo)山坡內(nèi)顆粒產(chǎn)生的高頻振動(dòng)波。先期結(jié)果顯示它比現(xiàn)有的儀器提供較少的判斷誤差。保特說， ―只要它不是太貴。 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(shí)飲酒的人相比，在就餐時(shí)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(xiǎn)。他的研究小組提供的報(bào)告令人沮喪的消息是就餐時(shí)飲酒不會(huì)消除患以上任何一種癌癥的危險(xiǎn)。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(xiǎn)增加了一倍。 ―Alcohol can inflame tissues. Over time, that inflammation can trigger cancer.‖ Dal Maso says. He suspects that food reduced cancer risk either by partially coating digestivetract tissues or by scrubbing alcohol off those tissues. He speculates that the reason laryngeal risks were dramatically lower for all study participants traces to the tissue‘s lower exposure to alcohol. ―酒精能使組織發(fā)炎，一段時(shí)間后，炎癥可引 發(fā)癌癥。 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(shí)間外飲酒 2. Which of the following is NOT the conclusion made by the researchers about ―drinking with meals‖?哪一個(gè)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。s biggest moon. 科學(xué)家們說，在土衛(wèi)六上發(fā)現(xiàn)了外星生命跡象并宣布了這一發(fā)現(xiàn)。 They argue that hydrogen gets absorbed before hitting Titan39。s the obvious gas for life to consume on Titan,similar to the way we consume oxygen on Earth,says NASA scientist Chris McKay.If these signs do turn out to be a sign of life,it would be doubly exciting because it would represent a second form of life independent from waterbased life on Earth. 美國國家航空航天局的科學(xué)家Chris Mckay 說， ―我們提出有氫氣的消耗，是由于它是土衛(wèi)六上生命賴以生存的顯而易見的氣體，就像我們地球上用氧氣呼吸一樣。在土衛(wèi)六上，絕對(duì)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(huì)凍成冰塊，不能融化。s surface. But Cassini detected no acetylene on the surface. 科學(xué)家們原指望太陽與大氣層中的化學(xué)物質(zhì)相互作用會(huì)在土衛(wèi)六上產(chǎn)生一層乙炔。 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(duì)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)。 3. To date, scientists have not yet detected this form of life.(paragraph 5)What does this formof life refer to?迄今為止科學(xué)家還未探測到這種生命形式。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)。s National Institute of Science and Technology, which has given Origen Therapeutics of Burlingame, California, and Embrex of North Carolina $ million to help fund research4. The prospect has alarmed animal welfare groups, who fear it could increase the suffering of farm birds. 這至少是美國國家科技院的夢想，科技院給Onrig