【正文】 ip Davis對這項研究并不以為然。他說，表演不僅僅是 假裝 成某個人，它還包括文本和語言的體現。由此推斷出Philip Davis對這項研究持懷疑態(tài)度，故選B。 （4）考查主旨大意。第二段中的“Now, researchers have said actors show different patterns of brain activity depending on whether they are in character or not.”現在，研究人員表示，演員的大腦活動模式不同，取決于他們是否扮演角色，是全文的主題句，結合全文內容，可知這篇文章主要介紹了一項對于演員大腦活動的研究，故選C。 【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)信息的基礎上，進一步根據上下文的邏輯關系，進行分析，推理，概括和歸納，從而選出正確答案。7．犇犇閱讀理解 Hacking isn39。t just for puters and smartphones, According to a study published last week in the journal Science, scientists have found a way to hack a plant39。s genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world. Photosynthesis（光合作用）is the word used to describe how plants use sunlight, water, and carbon dioxide to make their own food. Scientists who conducted the new study say this is a very slow process. Plants use less than 1 percent of the energy available to therm. But by hacking a plant39。s genes, the scientists were able to increase the amount of leaf growth on plants between 14 and 20 percent. Specifically, scientists hacked the plant39。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. Stephen Long is the lead author of the study. He pared a plant39。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. The new study sped up the process. By changing the plant39。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。 genes？ A.They will bee weaker and weaker.B.They will grow fast to produce more food.C.They will have more beautiful flowers.D.They will depend less on sunlight.（2）Why does the author mention lightadjusting glasses？ A.To warn people of the hot and bright sun.B.To explain the principle of plants39。 protective system.C.To help leaves of the plants absorb sunlight.D.To serve the science experiment smoothly.（3）In the future, the genetic changes will be used to. A.improve tobacco plants39。 qualityB.increase tobacco plants39。 leaves and rootsC.improve the flowers39。 living timeD.increase the production of corn and rice（4）Which of the following can be the theme of this text？ A.Hacking plants for more productionB.Leaf growing more quicklyC.Double production of tobacco plantsD.Photosynthesis and production【答案】 （1）B（2）B（3）D（4）A 【解析】【分析】本文是一篇說明文，科學家通過改變植物的基因，加快光合作用的速度，使植物葉子生長迅速，從而提高植物產量。 （1）考查細節(jié)理解。根據第一段中的“ scientists have found a way to hack a plant39。s genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world. ”可知，科學家發(fā)現改變植物基因會使植物的光合作用速度加快，將來會增加全球植物的產量。故選B。 （2）考查推理判斷。根據第四段中的“ He pared a plant39。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. ”可知，作者提到鏡片是為了說明植物的保護系統(tǒng)的工作原理與鏡片相同。故選B。 （3）考查細節(jié)理解。根據最后一段中的“ But they think the genetic changes will produce the same results in corn and rice. ”但是他們認為基因的改變將在玉米和水稻中產生相同的結果?？芍xD。 （4）考查主旨大意，根據文章內容可知，科學家改變植物的基因，加快光合作用的速度，使植物葉子生長迅速，從而提高植物產量。故選A。 【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)信息的基礎上，進一步根據上下文的邏輯關系，進行分析，推理，概括和歸納，從而選出正確答案。8．犇犇閱讀理解 Wolves strike fear into the hearts of many species, humans included. Our fear of them has brought them to the edge of dying out, as we have cruelly killed them as petitors and troublemakers. But researchers are discovering that the very fear they put into prey（被捕食者）species is exactly what helps make ecosystems（生態(tài)）healthy. Yellowstone National Park is a typical example of just how wolves can help repair an ecosystem. An October 2018 study analyzed 40 years of research on large animals inside the park. Yellowstone has benefited from the reintroduction of wolves in ways that we did not anticipate, especially the plexity of biological interactions（互動） in the park, explained Mark Boyce, a professor in the Department of Biological Sciences. We were really surprised at that and we39。d never have seen these responses if the park hadn39。t adopted ecologicalprocess management—allowing natural ecological processes to take place with least human intervention. After the wolves were reintroduced at Yellowstone, willow and cottonwood trees increased in number. The population of bears and bison also rose and what was once a ruling deerwolf interaction is now more diverse. To learn more about just how wolves are beneficial, a short documentary from Quest explains how the presence of wolves influences the behavior of deer, which eventually makes entire ecosystems more biologically diverse and healthy. In this documentary, biologist Aaron Wirsing explored why wolves and other top predators （捕食者）were needed for diverse ecosystems to develop. Using a simple video camera, Wirsing is gaining a unique view point on predatorprey relationships and changing the way we think about wolves. The research is one more piece of evidence for w