2014職稱(chēng)英語(yǔ)理工類(lèi)新增文章（A級(jí)）：補(bǔ)全短文第十五篇

　　IT’S DIFFICULT TO IMAGINE MANY THINGS that peoplewould welcome more than a memory-enhancing drug. ____1____ Furthermore, such adrug could help people remember past experiences more clearly and help usacquire new information more easily for school and at work. As scientists learnmore about memory, we are closing in on this tantalizing goal.1

　　Some of the most exciting evidence comes fromresearch that has built on earlier findings linking LTP2 and memoryto identify a gene that improves memory in mice. ____2____ Mice bred to haveextra copies of this gene showed more activity in their NMDA receptors，more LTP，and improved performance on severaldifferent memory tasks — learning a spatial layout3, recognizingfamiliar objects，and recallinga fear-inducing shock.

　　If these basic insights about genes, LTP, and thesynaptic basis of memory can be translated to people — and that remains to beseen — they could pave the way for memory-enhancing treatments. ____3____ Asexciting as this may sound, it also raises troubling issues. Consider thepotential educational implications of memory-enhancing drugs. If memoryenhancers were available, children who used them might be able to acquire andretain extraordinary amounts of information, allowing them to progress far morerapidly in school than they could otherwise. How well could the brain handlesuch an onslaught of information? What happens to children who don’t haveaccess to the latest memory enhancers? Are they left behind in school — and asa result handicapped later in life?

　　____4____ Imagine that you are applying for a jobthat requires a good memory，such as a manager at a technology company or a sales position thatrequires remembering customers’ names as well as the attributes of differentproducts and services. Would you take a memory-enhancing drug to increase yourchances of landing the position? Would people who felt uncomfortable takingsuch a drug find themselves cut out of lucrative career opportunities?

　　Memory drugs might also help take the sting out ofdisturbing memories that we wish we could forget but can’t.4 The2004 hit movie Eternal Sunshine of the Spotless Mind told the story of a youngman seeking just such freedom from the painful memories of a romantic breakup.As you will see in the section on persistence later in the chapter, emotionallyarousing events often create intrusive memories, and researchers have alreadymuted emotional memories with drugs that block the action of key hormones.Should emergency workers who must confront horrifying accident scenes that canburden them with persisting memories be provided with such drugs? Should suchdrugs be given to rape victims who can’t forget the trauma? Memory drugs mightprovide some relief to such individuals. But could they also interfere with anindividual’s ability to assimilate and come to terms with a difficultexperience?5 ____5____

　　詞匯：

　　tantalizing/ ?tænt?la?z?? / adj.誘人的

　　synaptic/ s??næpt?k / adj.(解剖學(xué))突觸的

　　steroid/ ?st??r??d / n.類(lèi)固醇

　　onslaught/ ??nsl?:t / n.大量

　　lucrative/ ?lu:kr?t?v / adj.有利可圖的

　　hit/hit / n.(演出等)成功

　　注釋?zhuān)?/strong>

　　1.As scientists learn more aboutmemory, we are closing in on this tantalizing goal.隨著科學(xué)家們對(duì)記憶了解增多，我們正接近這一誘人的目標(biāo)。

　　2.LTP&SNMDA：(Long-term Potentiation)給突觸前纖維一個(gè)短暫的髙頻剌激后，突觸傳遞效率和強(qiáng)度增加幾倍且能持續(xù)數(shù)小時(shí)至幾天保持這種增強(qiáng)的現(xiàn)象。LTP發(fā)現(xiàn)海馬LTP可能是學(xué)習(xí)記憶的分子基礎(chǔ)。1973年Bliss及其合作者，電刺激麻醉兔的內(nèi)嗅皮層，使海馬表層的穿通纖維興奮，可在齒狀回記錄到場(chǎng)電位。先用高頻電刺激幾秒鐘后，再用單個(gè)電刺激，記錄到的部分場(chǎng)電位幅度大大超過(guò)原先記錄的對(duì)照值，并可持續(xù)幾小時(shí)，幾天。這一現(xiàn)象稱(chēng)為長(zhǎng)時(shí)程增強(qiáng)效應(yīng)(LTP)。1983年發(fā)現(xiàn)NMDA(N—甲基一D—門(mén)冬氨酸)受體通道復(fù)合體在LTP過(guò)程中起重要作用，進(jìn)一步深化了對(duì)LTP在大腦學(xué)習(xí)記憶中作用的理解。

　　3.a spatial layout：空間布局

　　4.Memory drugs might also help takethe sting out of disturbing memories that we wish we could forget but can’t：增強(qiáng)記憶藥對(duì)我們想忘記卻又不能的令人煩擾的記憶變得令人易于接受。take the sting out of：使……易于被接受;使 ……令人感到愉快

　　5.But could they also interfere withan individual’s ability to assimilate and come to terms with a difficultexperience? 中的come toterms with：讓步;屈服

　　練習(xí)：

　　A　Like steroids for bulking up the muscles, these drugs would bulk upmemory.

　　B　A memory enhancer could help eliminate forgetting associated withaging and disease.

　　C　What are the potential implications of memory-enhancing drugs forthe workplace?

　　D　We may find ourselves struggling with these kinds of questions inthe not-too-distant future.

　　E　There is a pill that you could take every day to allow you toremember everything.

　　F　The gene makes a protein that assists the NMDA2 receptor，which plays an important role inlong-term memory by helping to initiate LTP.

　　答案與題解：

　　1.B依據(jù)上一句的“很難想象一種提高人們記憶力的藥會(huì)受到人們吹捧”;下面應(yīng)該對(duì)這一現(xiàn)象做出解釋?zhuān)催@種藥物有什么療效;而后一句的Furthermore這一指示詞起到了遞進(jìn)的作用，進(jìn)一步說(shuō)明這種藥物的益處。More than ：非常，極其，十分

　　2.F前一句的關(guān)鍵詞是gene、LTP和mice，它講的是有些令人興奮的證據(jù)是從研究中得出的;該研究基于早期連接LTP和記憶的發(fā)現(xiàn)，該結(jié)果確定了提髙老鼠記憶的基因;而后一句進(jìn)一步闡述這一發(fā)現(xiàn)，開(kāi)頭的mice可以是一個(gè)連接詞。

　　3.A前一句講：如果這種結(jié)果用于人類(lèi)的話(huà)，人們就有可能把提高人的記憶力用于臨床。這一句講：就像類(lèi)固醇用于提髙人的肌肉能力，這種藥物也可以提高人的記憶力。

　　4.C一般情況下，每一段的第一句都是本段的主題句。而該句是一個(gè)問(wèn)句：這種提高記憶力的藥物用于職場(chǎng)有什么潛在的啟示呢?緊接著本段其余幾句都提出關(guān)于這種藥物是否會(huì)對(duì)職場(chǎng)的提升有什么影響的問(wèn)題。

　　5.D本句是全文的最后一句。應(yīng)該是總結(jié)性的。鑒于前面都列舉了這種提高記憶力的藥所面臨的一系列問(wèn)題，所以，我們?cè)诓痪玫膶?lái)要面臨這些問(wèn)題。