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職稱英語(yǔ)理工a幺建華考試小抄字典版-免費(fèi)閱讀

  

【正文】 Just as students find certain subjects to be difficult, teachers can find certain subjects to be difficult to learn and teach. The subject of math can be particularly difficult for everyone. Researchers use the word anxiety to describe such feelings: anxiety is uneasiness or worry. 如同學(xué)生,教師也會(huì)覺(jué)得某些學(xué)科難學(xué)和難教,這就是研究者所言的 焦慮 :不自在或擔(dān)心。 ‖ Another challenge for Origen is to scale up10 production. To do this, it has teamed up with11 Embrex, which produces machines that can inject vaccines into up to 50,000 eggs12 an hour. Embrex is now trying to modify the machines to locate the embryo and inject the cells into precisely the right spot without killing it. Origen 面臨的另一個(gè)挑戰(zhàn)是提高生產(chǎn)量。 ‖F(xiàn)itzgerald說(shuō) Using a longestablished technique, these donor cells will then be injected into the embryo of a freshly laid, fertilized recipient egg9, forming a chick that is a chimera. Strictly speaking a chimera isn39。這個(gè)預(yù)想為擔(dān)憂增加雞場(chǎng)小雞痛苦的動(dòng)物福利組織拉響了警報(bào)。(第五段) ―這種生命形式 ‖指的是什么? B Methanebased 命。但卡西尼號(hào)在它的表面沒(méi)有探測(cè)到乙炔。如果這些跡象最終證明是生命的跡象,它會(huì)加倍令人興奮,因?yàn)樗鼤?huì)代表完全不同于地球上水基生命的第二種生命。美國(guó)國(guó)家航空航天局 (NASA)的研究者們對(duì)卡西尼號(hào)探測(cè)器所傳回來(lái)的數(shù)據(jù)進(jìn)行了分析,數(shù)據(jù)表明,土星衛(wèi)星中最大的一顆衛(wèi)星有以甲烷為基礎(chǔ)的生命的存在跡象。 ‖Dal Maso 說(shuō)。 For their new analysis, the European scientists divided people in the study into four groups, based on how many drinks they reported having in an average week. The lowestintake group included people who averaged up to 20 drinks a week. The highest group reported downing at least 56 servings of alcohol weekly for an average of eight or more per day. Cancer risks for the mouth and neck sites rose steadily with consumption even for people who reported drinking only with meals. For instance, pared with people in the lowestconsumption group, participants who drank 21 to 34 alcohol servings a week at least doubled their cancer risk for all sites other than the larynx. If people in these consumption groups took some of those drinks outside meals, those in the higher consumption group at least quadrupled their risk for oral cavity and esophageal cancers. 為了進(jìn)行新的頒,歐洲科學(xué)家根據(jù)每星期平均飲酒量將被研究者分為4 組。 ‖但是,保特又說(shuō)一個(gè)早期預(yù)警系統(tǒng)本身并不足以防災(zāi), ―你需要建立人際交流, ‖他說(shuō), ―使系backer bag 60 統(tǒng)發(fā)射的預(yù)警送達(dá)到需要的人群是不容易的事。振動(dòng)波順著鋼管上傳,被地表傳感器接收。s team has developed a device that listens for the vibrations39。 ‖ 1. What does the writer say about plants concerning solar energy? 關(guān)于植物涉及太陽(yáng)能,作者說(shuō) ? C) Plants have been using solar energy for billions of years. 植物數(shù)十億 年來(lái)一直利用太陽(yáng)能 2. Why do some scientists study how plants convert sunlight carbon dioxide, and water into sugars and starches? 一些科學(xué)家研究植物如何把陽(yáng)光、二氧化碳、水轉(zhuǎn)化成糖和淀粉的原因backer bag 60 是 ? B) Because they want green plants to bee a new source of energy. 因?yàn)樗麄兿胱尵G色植物變成新的能源 3. According to the fifth paragraph, under what conditions are algae able to use solar energy to make hydrogen? 根據(jù)第五段, ___時(shí),海藻能用太陽(yáng)能制造氫氣? B) When there is no oxygen in the air. 當(dāng)空氣中沒(méi)有氧氣 4. Researchers have met with difficulties when trying to make algae produce hydrogen efficiently. Which one of the following is one such difficulty? 研究員們發(fā)現(xiàn)在努力使海藻有效產(chǎn)生氫氣時(shí)存在困難,這樣的困難是 ? D) It is too slow for algae to produce hydrogen when the sulfate is removed. 硫酸鹽被清除后,海藻太慢而不能產(chǎn)生(更多)的氫氣 5. What is NOT true of algae? 于海藻的說(shuō)法,錯(cuò)誤的是 ?C) They are cheap to eat. 作為食物,它們很便宜 36Listening Device Provides Landslide Early Warning 聽(tīng)覺(jué)儀器提供早期山崩預(yù)警 A device that provides early warning of a landslide by monitoring vibrations in soil is being tested by UK researchers. The device could save thousands of lives each year by warning when an area should be evacuated, the scientists say. Such natural disasters arc mon in countries that experience sudden, heavy rainfall, and can also be triggered by earthquakes and even water erosion. 英國(guó)研究者們正在測(cè)試一種儀器,它可以通過(guò)監(jiān)測(cè)土壤振動(dòng)提供早期山崩預(yù)告。s cells work very slowly, and not much hydrogen is produced. Still, the researchers see this as a first step in their goal to produce hydrogen efficiently from algae. With more work, they may be able to speed the cells39。奇若蒂說(shuō): ―但在一定條件下,有很多藻類能夠利用日光能源產(chǎn)生氫氣而不是儲(chǔ)存淀粉。s trying to trick them into producing hydrogen4 instead of sugars when they perform photosynthesis. Once the researchers can get the algae working efficiently, the hydrogen that they produce could be used to power fuel Cells in cars or to generate electricity.一些科學(xué)家正試圖像植物的作用過(guò)程一樣,將植物,或生物的細(xì)胞活動(dòng)看做微型光合發(fā)電站。 Ceils in the green leaves of plants work like tiny factories to convert sunlight, carbon dioxide, and water into1 sugars and starches, stored energy that the plants can use. This conversion process is called photosynthesis. Unfortunately, unless you39。這些為電池能會(huì)改變我們對(duì)病毒的看法。 A 型、 C 型和 D型電池都可以握在手里。貝爾徹最早產(chǎn)生了這一想法。難怪大部分人一提到病毒,首先想到的是如何躲避病毒。s on people39。re not so strange for engineer Angela Belcher, who first came up with5 the idea. At the Massachusetts Institute of Technology (MIT) in Cambridge, she and her collaborators bring together different areas of science in new ways. In the case of the virusbuilt batteries, the scientists bine what they know about biology , technology and production techniques. 病毒和電池的搭檔似乎并不常見(jiàn),但這對(duì)于工程師安吉拉 哈蒙德和以電池形式存儲(chǔ)能量的專家蔣業(yè)明。 ,貝爾徹的電池模型是完全由病毒構(gòu)成的金屬圓盤,看起來(lái)就像普通手表電池。ve been using sunlight as an energy source for billions of years. 太陽(yáng)能的使用已經(jīng)不足為奇??上悴皇且恢曛参铮仨毨щy的并且花上大價(jià)錢將陽(yáng)光轉(zhuǎn)換為穩(wěn)定的能源。 The algae are grown in narrownecked glass bottles to produce hydrogen in the lab. During photosynthesis, plants normally make sugars or starches. But under certain conditions, a lot of algae are able to use t
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