【正文】 60。 Ocean animals large and small, however, respond to even slight changes in oxygen by seeking refuge in higher oxygen zones or by adjusting behavior, Oschlies and others in his field have found. These adjustments can expose animals to new predators or force them into foodscarce regions. Climate change already poses serious problems for marine life, such as ocean acidification, but deoxygenation is the most pressing issue facing sea animals today, Oschlies says. After all, he says, they all have to breathe. Aside from food web problems, animals face various other physiological challenges as their bodies adjust to lower oxygen levels. Chinese shrimp (蝦) move their tails less vigorously to preserve energy in lower oxygen environments. Some creatures, such as jellyfishes, are more tolerant of low oxygen than others are. But all animals will feel the impact of deoxygenation because they all have evolved their oxygen capacity for a reason, says Oschlies. Any drop in oxygen is going to damage survivability and performance, he says.（1）According to the first two paragraphs, what worries scientists the most? A.The worsening deoxygenation in the warming ocean.B.The survival of predators and various marine animals.C.The alarmingly changeable oxygen levels in the ocean.D.The lack of attention to the warming of tropical oceans.（2）Which of the following is a reason for the oxygen loss in the ocean? A.Polar ice melting consumes much oxygen in the ocean.B.Global warming reduces the amount of oxygen in the air.C.The surface polar ice water prevents oxygen going down.D.Salty water holds less gas in the increasingly warmer ocean.（3）What can be inferred from the passage? A.Ocean deoxygenation changes some animals39。 natural territories.B.Ocean acidification is more serious a problem than deoxygenation.C.Not all ocean animals are bothered by the decreasing oxygen levels.D.Some animals reduce their movements in order to absorb more oxygen.（4）Which of the following is the best title of the passage? A.The Oxygen Levels of Marine LifeB.Ocean Warming Affects Food WebC.The Survivability of Ocean AnimalsD.The Ocean Is Running Out of Breath【答案】 （1）A（2）C（3）A（4）D 【解析】【分析】本文是一篇說(shuō)明文，介紹了海洋氧含量下降是一個(gè)與氣候變化有關(guān)的令人擔(dān)憂的趨勢(shì)。同時(shí)介紹了海洋氧含量下降的原因以及對(duì)海洋生物的影響和對(duì)其生存的威脅。 （1）考查細(xì)節(jié)理解。根據(jù)第二段中的It is no surprise to scientists that warming oceans are losing oxygen, but the scale of the drop calls for urgent attention. Oxygen levels in some tropical (熱帶的) regions have dropped by an astonishing 40 percent in the last 50 years, some recent studies reveal. Levels have dropped less significantly elsewhere, with an average loss of 2 percent globally.可知，對(duì)于科學(xué)家來(lái)說(shuō)，變暖的海洋正在失去氧氣并不奇怪，但這種下降的規(guī)模需要緊急關(guān)注。一些最近的研究表明，在過(guò)去的50年里，一些熱帶地區(qū)的氧氣含量下降了驚人的40%。其他地區(qū)的降幅較小，全球平均降幅為2%。所以根據(jù)前兩段，科學(xué)家最擔(dān)心的是變暖的海洋中日益惡化的脫氧現(xiàn)象。故選A。 （2）考查細(xì)節(jié)理解。根據(jù)第三段中的 as polar sea ice melts, it forms a layer of water above colder, more salty sea waters. This process creates a sort of lid that can keep currents from mixing surface water down to deeper depths. And because all oxygen enters the surface, less mixing means less of it at depth.可知，當(dāng)極地海冰融化時(shí)，它會(huì)在更冷、更咸的海水上形成一層水。這個(gè)過(guò)程會(huì)形成一種冰蓋，它可以防止水流將地表水混合到海洋更深的深度。因?yàn)樗械难鯕舛歼M(jìn)入了表面，所以較少的與海洋水的混合意味著更深的海洋含氧量更少。所以表面的極地冰水阻止氧氣下沉是海洋缺氧的原因之一。故選C。 （3）考查推理判斷。根據(jù)倒數(shù)第二段中的Ocean animals large and small, however, respond to even slight changes in oxygen by seeking refuge in higher oxygen zones or by adjusting behavior, Oschlies and others in his field have found. These adjustments can expose animals to new predators or force them into foodscarce regions. 可知，然而，Oschlies和他所在領(lǐng)域的其他人發(fā)現(xiàn)，無(wú)論大小，海洋動(dòng)物對(duì)氧氣的微小變化都有反應(yīng)，它們?cè)谳^高的含氧區(qū)尋求庇護(hù)，或是調(diào)整行為。這些調(diào)整可能使動(dòng)物暴露在新的掠食者面前，或迫使它們進(jìn)入食物匱乏的地區(qū)。所以海洋中氧含量減少迫使動(dòng)物離開(kāi)自己的棲息地，去氧氣含量較高的地區(qū)尋求庇護(hù)。故判斷出海洋脫氧改變了一些動(dòng)物的自然領(lǐng)地。故選A。 （4）考查主旨大意。通讀全文可知，短文說(shuō)明了海洋氧含量下降是一個(gè)與氣候變化有關(guān)的令人擔(dān)憂的趨勢(shì)，海洋氧含量下降的原因以及對(duì)海洋生物的影響和對(duì)其生存的威脅。所以短文主要是圍繞著海洋氧含量下降而展開(kāi)的。故短文的最佳標(biāo)題為海洋快喘不過(guò)氣來(lái)了符合題意。故選D。 【點(diǎn)評(píng)】本題考點(diǎn)涉及細(xì)節(jié)理解，推理判斷和主旨大意三個(gè)題型的考查，是一篇環(huán)保類閱讀，要求考生在捕捉細(xì)節(jié)信息的基礎(chǔ)上，進(jìn)一步根據(jù)上下文的邏輯關(guān)系，進(jìn)行分析，推理，概括和歸納，從而選出正確答案。8．閱讀理解 Learning, Fast and Deep Over the past five years researchers in artificial intelligence have bee the rock stars of the technology world. A branch of AI known as deep learning, which uses neural(神經(jīng)的) networks to scan through large volumes of data looking for patterns, has proven so useful that skilled practitioners can mand high sixfigure salaries to build software for Amazon, Apple, Facebook and Google. The standard route into these jobs has been a PhD in puter science from one of America39。s top universities. Earning one takes years and requires a personality suited to academia, which is rare among more normal folk. That is changing. Last month , a nonprofit education organization based in San Francisco, kicked off the third year of its course in deep learning. Since its foundation it has attracted more than 100, 000 students around the globe from India to Nigeria. The course and others like it, e with a simple idea: there is no need to spend years obtaining a PhD in order to practise deep learning. Creating software that learns can be taught as a craft, not as a high intellectual pursuit to be undertaken only in an ivory tower. Fast. ai39。s course can be pleted in just seven weeks. To make it accessible to anyone who wants to learn how to build AI software is the aim of Jeremy Howard, who founded with Rachel Thomas, a mathematician. He says school mathematics is sufficient. No. Greek. Letters, Mr. Howard intones, pounding the table with his fist for punctuation. Some experts worry that this will serve only to create a flood of unreliable AI systems which will be useless at best and dangerous at worst. In the earliest days of the Internet, only a select few nerds, namely puter holies with specific skills, could build applications. Not many people used them. Then the invention of the World Wide Web led to an explosion of web pages, both good and bad. But it was only by opening up to all that the Internet gave birth to online shopping, instant global munications and search. If Mr. Howard and others have their way, making the development of AI software easier will bring forth a new crop of fruit of a different kind.（1）What can we learn about deep learning? A.It replaces arti