【正文】 is no cure for HIV/AIDS though there have been developments in oral drug treatments to slow the progression of the disease. They say the easiest and most costeffective way to use the rice will be to make it into a cream to be put on the skin. The HIVfighting proteins can then enter the body through the skin. People all over the world could grow the rice and make the cream themselves. This would prevent the cost and travel required for many patients to receive treatments and medicine.Stress the urgency of HIV treatments.B.Remind readers of HIV prevention.D.By transforming it into proteins.B.By attaching it to the HIV virus.D.It can prevent infections of HIV.B.It still requires perfecting.D.A biology textbook.B.A social webpage.D.研究人員表示，這一“突破性”的發(fā)現(xiàn)是“現(xiàn)在唯一的”以低成本為發(fā)展中國家生產(chǎn)抗艾滋病毒聯(lián)合治療的方法，但還有待于進一步的完善。根據(jù)第三段中的“nearly 37 million people were living with HIV in 2017.... Now there is no cure for HIV/AIDS though there have been developments in oral drug treatments to slow the progression of the disease” 可知，“2017年全世界有近3700萬人感染艾滋病毒。由此可推斷出對于艾滋病的治療迫在眉睫，非常緊迫。 （2）考查細節(jié)理解?！皌he most costeffective”與“the lowest cost”是同義詞，“make it into a cream”與“process it into a cream”是同義的。 （3）考查推理判斷。由此可推斷這種基因工程的過程還需要進一步的完善。 （4）考查推理判斷。因此與人類的健康有關(guān)，所以本文可能是出現(xiàn)在健康雜志上，故選B。6．犇犇閱讀理解 Shining iridescent color, which changes depending on the angle from which it39。 And in our research group we are of course interested in why this vivid metallic color is so widespread in nature. Karin Kjernsmo of the University of Bristol adds that in some cases the showy splashes of light are a sexual strategy. Here I would like to point out that in some species, particularly those that display strong sexual dimorphism(雌雄兩性), such as birds of paradise or some butterflies or fishes, the occurrence of iridescence is most likely driven by sexual selection. For example, in many of these cases it is the males that have these vivid iridescent colors and they use them in mate choice or they use them as a signal to attract mates. The idea that eye173。up isn39。Coloration in the Animal Kingdom, already in 1909, that 39。s concealment39。s concealment？ s173。live a little longer by escaping their predator(捕食者)catch the attention of their matesC.D.Bees can always tell the difference between a circle and an ovalB.If a circle, with a sugar reward, is iridescent, the bees may have difficulty finding itD.Whether there are any differences between bees and birds.B.Why birds are not effected by iridescent insects.D.A famous camouflage strategyMetallic iridescent as the best disguiseC.Shining colors as a sexual strategy【答案】 （1）D（2）C（3）C（4）B 【解析】【分析】本文是一篇說明文，介紹了彩虹色有助于生物隱藏。根據(jù)第一段中的“A good disguise keeps you hidden, right? Well, sometimes the best disguise is actually the most dazzling because research reveals that flashy metallic iridescence(金屬彩虹色) can visually puzzle predators, which allows colorful prey to survive another day.”可知彩虹色被動物用來通過逃離捕食者而活得更久，排除A；根據(jù)第三段中的“Here I would like to point out that in some species, particularly those that display strong sexual dimorphism(雌雄兩性), such as birds of paradise or some butterflies or fishes, the occurrence of iridescence is most likely driven by sexual selection.”在這里我想指出的是，在某些物種中，尤其是那些表現(xiàn)出強烈兩性差異的物種，比如天堂鳥、孔雀，甚至在某些蝴蝶或魚類中，彩虹色的出現(xiàn)很可能是由性別選擇所驅(qū)動的。catching colors could be used as a cover173。t a new one.”引人注目的顏色可以用來偽裝，這種想法并不新鮮，排除C，故選D。根據(jù)最后一段中的“It seemed that the strikingly iridescent surfaces on our targets visually broke up the otherwise recognizable shape of the targets, which made them hard to distinguish.”似乎我們的目標上驚人的彩虹表面在視覺上打破了原本可以辨認的目標形狀，這使得它們很難區(qū)分。 （3）考查推理判斷。實驗?zāi)康氖强纯带B類的視角是否能提供幫助。 （4）考查主旨大意。 【點評】本題考點涉及細節(jié)理解，推理判斷和主旨大意三個題型的考查，是一篇科研類閱讀，要求考生在捕捉細節(jié)信息的基礎(chǔ)上，進一步根據(jù)上下文的邏輯關(guān)系，進行分析，推理，概括和歸納，從而選出正確答案。Some things should just be mon knowledge by now. The Earth isn39。t grow after you die. The holes at the top of Bic biro pens are there so that, if you swallow one accidentally, you can still breathe and won39。s debatable whether that last one there is mon knowledge or not. A quick Google search of the fact, rewritten as a question, shows articles addressing this point going back several years, with the latest (re)appearing just this week over on ScienceAlert. We suppose it39。If you jump over to Bic39。 pens have a hole in their cap is to prevent the cap from pletely obstructing the airway if accidentally breathed in. This is requested by the international safety standards ISO11540, except for in cases where the cap is considered too large to be a choking risk. s rather lovely of them. In appreciation of their want to not kill off their more clumsy customers, we thought we39。The best part of the Bic site, however, is this rather curious fact: 100 percent of pen balls are made through a highlycontrolled process. As opposed to a highly uncontrolled process, involving explosions and bouncy castles and total chaos, we suppose.（1）Why does the author mention the case of Yellowstone? A.B.To pare the two situations.To emphasize the importance of safety.（2）What does the underlined word obstructing in paragraph 2 mean? A.B.C.D.To work out their lifespan.To assure their good quality.C.To pare different pens with each other.（4）In what tone does the author develop the text? A.B.C.D.這真是粗心使用者的生命通道。畢克筆的筆帽上留一個小孔的原因，且這個問題會被偶爾問到，就像如果你用核武器攻擊黃石公園會發(fā)生什么事這個問題一樣，作者是在舉例證明他的觀點，故選B。此處意為當使用者不慎把筆帽吞下時，筆帽上的小孔就是為了阻止筆帽完全阻塞氣管而引起窒息，故選A。根據(jù)第三段中的In fact, in 2018, 7,250 kilometers (4,505 miles) of writing tests on such pens were carried out on ballpoint pens, gel pens(中性筆), and rollers to make sure they worked to the highest standard.可知，舉行書寫測試的目的是為了確保筆能夠達到最高的標準，故選B。根據(jù)第一段中的Some things should just be mon knowledge by now. The Earth isn39。t grow after you die. 和第三段中的That39。 【點評】本題考點涉及細節(jié)理解，詞義猜測和推理判斷三個題型的考查，是一篇科普類閱讀，考生需要準確捕捉細節(jié)信息，并根據(jù)上下文進行邏輯推理，從而選出正