【正文】 t chemicals, other ants left the treated pupae alone. Choe believes this behavior shows that the not dead yet chemicals override the dead chemical when picked up by adult ants. And that when an ant dies, the not dead yet chemicals fade away. Other nearby ants then detect the remaining dead chemical and remove the body from the nest.詞匯：Zombie n 還魂尸，僵尸 Pupa Graveyard hypothesis override ，比……更重要注釋：1. night：night 是個(gè)多義詞，其比喻意義是“死亡”，即本篇短文標(biāo)題中該詞的意思。2. the University of California：加利福尼亞大學(xué)，位于美國西部的公立高等學(xué)校系統(tǒng) ，目前擁有10所大學(xué)，包括加州大學(xué)伯克利分校（Berkeley）、洛杉磯分校（ Los Angeles）、 圣地亞哥分校（San Diego）、圣克魯茲分校（Santa Cruz）等。4. But there39。s ，Choe 又有了新的出乎意料的發(fā)現(xiàn)。5. 本句 it39。s dead 中兩個(gè) it 指代前面爬行中的螞蟻，也 就是下段第一句中的 the living dead。7. treated pupae：經(jīng)過處理的蛹，即被科學(xué)家涂抹上化學(xué)藥劑的蛹。s finding?A When an ant dies, it produces a I am dead signal.B Living ants have the death chemical on their bodies.C Ants have two sets of chemicals on theft bodies.D Ants have the I am not dead chemical on their bodies.4. According to Choe39。s body when it dies.C the I am not dead yet chemical is left when an ant dies.D the I am not dead yet chemical leaves the ant39。s hypothesis?A It proves that his hypothesis is time.B Not enough evidence has been found to support his hypothesis.C It shows that his hypothesis is wrong.D It indicates that his hypothesis needs revising.答案與題解：1. C 根據(jù)文章第二段和第三段的表述，阿根廷螞蟻身上有種化學(xué)物質(zhì)，它會(huì)告訴其他螞 蟻“I am dead.”。2. B keep sb. from doing sth. 這個(gè)句型的意思是：使……不做……，阻止……去做……。3. A 第三段和第四段告訴我們，螞蟻身上會(huì)帶有兩種化學(xué)氣味，“I am not dead yet” 和“I am dead”。短文的第六段告訴我們， 螞蟻死去時(shí) ，“I am not dead yet”的氣味就離開了它的軀體，剩下的就是“I am dead” 的 氣味 。所以 A 是正確的選擇。m dead” is left。所以，其他選項(xiàng)都是錯(cuò)誤理解。+第46篇 How the First Stars in the Universe Came into ExistenceResearchers believe that our universe began with the Big Bang1 about 13 billion years ago, and that soon after that event, matter began to form as small dust grains and gases. How the first stars formed from this dust and gas has been a burning question2 for years, but a stateoftheart3 puter simulation now offers the most detailed picture yet of how these first stars in the universe came into existence.The position of the early universe was quite different from that of today, and the physics that governed the early universe were also somewhat simpler. Dr. Naoki Yoshida and colleagues in Japan and the U. S. incorporated these conditions of the early universe, sometimes referred to as the cosmic dark ages, to simulate the formation Of an astronomical object that would eventually shine its light into this darkness.The result is a detailed description of the formation of a protostar4 the early stage of a massive primordial star of our universe and the researchers39。s simulation also shows that the protostar would likely evolve into a massive star capable of synthesizing heavy elements, not just in later generations of stars, but soon after the Big Bang.This general picture of star formation, and the ability to pare how stellar objects form in different time periods and regions of the universe, will eventually allow investigation into the origins of life and planets, said Lars Hernquist, a Professor of Astronomy at Harvard University. The abundance of elements in the universe has increased as stars have accumulated, he says,and the formation and destruction of stars continues to spread these elements further across the universe. So when you think about it, all of the elements in our bodies originally formed from nuclear reactions in the centers of stars, long ago.Their simulation of the birth of a protostar in the early universe signifies a key step toward the ambitious goal of piecing together the formation of an entire primordial star and of predicting the mass and properties of these first stars of the universe. More powerful puters, more physical data, and an even larger range will be needed for further calculations and simulations, but these researchers hope to eventually extend this simulation to the point of nuclear reaction initiation when a stellar object bees a true star.詞匯：astronomical adj. 天文的；天文學(xué)的 prestellar adj. 前恒星的 synthesize ，綜合protostar stellar ；星球的 primordial adj. 原始的注釋：1. the Big Bang：宇宙大爆炸，創(chuàng)始大爆炸。根據(jù) 大爆炸理論，大約在 130 億年前，宇宙所有的物質(zhì)都高度密集在一點(diǎn)，有著極高的溫度 ， 因而發(fā)生了巨大的爆炸。但是，宇宙大爆炸僅僅是一種學(xué)說，是根據(jù)天文觀測研究之后得到的一種設(shè)想。3. stateoetheart：形容詞，意思是“最新的”、“達(dá)到最高技術(shù)水平的”、“代表當(dāng)前科 技發(fā)展水平”。原恒星由 “大爆炸”后產(chǎn)生的星際云演變而來。該段第一和第二句告訴我們，大爆炸 后，粉塵和氣體開始聚集成物質(zhì)，這些物質(zhì)形成了宇宙中的星球。2. C 根據(jù)上下文，astronomical object 指的是上段第二句中的“first stars”，即下面 一段第一句中的“protostar”。nju:t/。從上文和該段的最后一個(gè)句子可以得知，原 恒星進(jìn)化的過程不是在宇宙大爆炸之前發(fā)生。5. D A 是最后一段第一句句子的表述內(nèi)容，B 和 C 是文章最后一句的表述內(nèi)容。+第50篇 Cell Phones Increase Traffic, Pedestrian FatalitiesCell phones are a danger on the road in more ways than one. Two new studies show that talking on the phone while traveling, whether you39。 were able to quickly call for medical assistance when involved in an accident. This quick medical response actually reduced the number of traffic deaths for a time, Loeb hypothesizes.However, this was not the case when cells were first used in the mid1980s, when they caused a lifetaking effect among pedestrians, drivers and passengers in vehicles. In those early days, when there were fewer than a million phones, fatalities increased, says Loeb, because drivers and pedestrians probably were still adjusting to the novelty of using them, and there weren39。2. The new studies, leadauthored by Rutgers University, Newark, Economics Professor Peter D. Loeb ...第一作者為羅格斯大學(xué)紐瓦克分校的經(jīng)濟(jì)學(xué)教授 Peter D. Loeb 的新研究成果……leadauthor：第一作者；leadauthored 為動(dòng)詞的過去分 詞形式，具有被動(dòng)意義。3. critical mass：臨界數(shù)量。5. a critical threshold：指的是前文所說的 critical mass。6. was canceled out：被抵消。t enough cell phones in use then.B The increased use of cell phones then caused a lifetaking effect.C Traffic fatalities increased then because the number of cell phones in use decreased.D Traffic fatalities decreased then because the number of cell phones in use increased.5. Which of the