【正文】 D.Double production of tobacco plantsB.Hacking plants for more productionD.improve the flowers39。increase tobacco plants39。 qualityTo serve the science experiment smoothly.（3）In the future, the genetic changes will be used to. A. protective system.C.To warn people of the hot and bright sun.B.D.They will grow fast to produce more food.C.They will bee weaker and weaker.s genes, the protective system turned on and off more quickly than normal. As a result, leaf growth on the plants scientists used in the study increased. Leaf growth in two plants increased by 20 percent, while leaf growth on a third plant increased by 14 percent. Scientists conducted the study on tobacco plants. But they think the genetic changes will produce the same results in corn and rice. （1）What will happen to the plants when scientists change plants39。s protective system to lightadjusting glasses. When a person wears the glasses outside during the day, the lenses（鏡片）darken and lighten depending on how sunny it is. Plants do the same thing, he said. But in plants the adjustment can take anywhere from 10 minutes to an hour. This makes it hard for plants to get the right amount of sunlight needed to create food. s protective system. Normally, this system is activated when a plant gets too much sunlight, said scientist Krishna Niyogi, coauthor of the study. When the plant senses the light, it gets rid of extra energy and creates more leaves. When the plant is in shade, the protective system is turned off, but the process is slow. s genes, the scientists were able to increase the amount of leaf growth on plants between 14 and 20 percent. s genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world. Hacking isn39。 【點評】本題考點涉及推理判斷和主旨大意兩個題型的考查，是一篇科普類閱讀，要求考生根據(jù)上下文的邏輯關系，進行分析，推理，概括和歸納，從而選出正確答案。 （4）考查主旨大意。亞歷山大，一個出身于186年的澳大利亞演員，在年輕的時候聲音出了問題。 （3）考查推理判斷。 （2）考查推理判斷。根據(jù)第一段中的“I was brought up to think that the preferred way of dealing with aches is to do nothing and hope they39。People with back pain are victims of inappropriate postures.【答案】 （1）D（2）D（3）A（4）C 【解析】【分析】本文是一篇說明文，介紹亞歷山大技巧的對于矯正身體的作用以及其發(fā)明者。Alexander improved the technique to treat body pain.C.He had to leave home to develop his technique.（4）What is the main idea of the passage? A.He was eager to make a name for himself.C.t be done with much effort.（3）What can we learn about Frederick Alexander? A.t be attempted alone.D.t be bined with other exercises.C.t be pletely relieved.B.She was unwilling to seek treatment for her backache.（2）What is the principle of the Alexander technique? A.She was sceptical about the doctor39。She felt no better after the treatment.B. So if you39。 The technique helps to break the bad habits accumulated over years. Try folding your arms the opposite way to normal. This is an example of a habit the body has formed which can be hard to break. Many of us carry our heads too far back. The head weighs four to six kilos, so any inappropriate posture can cause problems for the body. The technique teaches you to let go of the muscles holding the head back, allowing it to go back to its natural place on the top of our spines.ll go away, but I eventually went to the doctor. After examining me, he said, You actually have bad posture (姿勢). Go off and learn the Alexander technique. Three months later I could walk straighter and sit better. Until earlier this year, I didn39。 【點評】本題考點涉及細節(jié)理解和主旨大意兩個題型的考查，是一篇科研類閱讀，考生需要準確掌握細節(jié)信息，同時根據(jù)上下文進行推理，歸納，從而選出正確答案。d rather think of language as product of our thought, rather than of the arrangement of our teeth. In reality, though, any given language must be both.”可知任何一種語言的誕生都必須同時具備思想和飲食這兩種因素的影響。 （4）考查主旨大意。根據(jù)第三段中的“The argument goes that famers eat more cooked food and more dairy than hunter gatherers.”可知農民比狩獵采集者吃更多的熟食和奶制品，即農民們發(fā)f和v音的原因是他們喜歡吃更多的熟食。故選D。根據(jù)第二段中的“New research suggests that the apparently arbitrary distribution of some sounds around the world may be partially explained by diet.”可知某些聲音在世界范圍內的任意分布，部分可以用飲食來解釋。根據(jù)第一段中的“By the age of one, they can recognize the significant noises around them and group them into a language.”可知一歲的嬰兒和成人相比更能識別出周圍的重要聲音，故選D。同時這也強調了人類特有的一切都是物質和精神的結合:語言必須把聲音和意義結合起來，沒有真實的物體，意義就不可能存在或傳播。language consists of sound and meaning【答案】 （1）D（2）D（3）A（4）C 【解析】【分析】本文是一篇說明文，人們一直以來認為語言是思想的產物，但是有新的研究表明飲食對于語言也會產生一些影響。food determines our thoughtC.. A.constantly chewing harder foodsD.enjoying more cooked foodsB. making sounds of f and v is D.C.B.distinguish meaningful sounds（2）According to the passage, which of the following factors help shape language? A.classify the forms of noisesC.. A. Beyond these particular changes, the story highlights the way in which everything distinctively human is both material and spiritual: speech must bine sound and meaning, and the meaning can39。 Hunter gatherer languages very seldom use the sounds known as labiodentals (唇齒音)－those such as f and v－that are made by touching the lower lip with the upper teeth. Only two of the hundreds of Australian aboriginal languages use them, for example. But in cultures that have discovered farming, these consonants (輔音) are much more mon. The argument goes that farmers eat more cooked food and more dairy than hunter gatherers. Either way, they need to chew mush less, and to bite less with their front teeth. So farmers grew up with smaller lower jaws and more of an overbite than their ancestors who had to bite through harder foods. It became easier for them to make the labiodental consonants instead of purely labial (唇音) ones: one example is that f e to take the place of p. Romans said pater but English speakers (unless they39。d rather think of language as product