【正文】 how wolves behave in the wild.B.To show how wolves benefit from ecosystems.C.To record how Aaron Wirsing observed wolves.D.To study what good wolves can do to ecosystems.（3）What is the significance of the research? A.It proves wolves feed on hundreds of species.B.It helps prove the importance of protecting wolves.C.It shows the plex relationships between species.D.It provides evidence that wolves are endangered animals.（4）What is the main idea of the passage? A.The fear of wolves is beneficial to ecosystems.B.The fear of wolves put them in danger of disappearing.C.Yellowstone National Park owes its healthy ecosystems to wolves.D.The introduction of wolves in Yellowstone National Park is a success.【答案】 （1）A（2）D（3）B（4）A 【解析】【分析】本文是一篇說明文，研究表明人類以及其他動物對狼的恐懼對維持健康、平衡的生態(tài)系統(tǒng)是有益的，其中黃石公園灰狼的引進就是一個典型的例子。 （1）考查詞義猜測。根據(jù)第三段中的We were really surprised at that可知，黃石公園在意想不到的方面從重新引入狼中獲益。故選A。 （2）考查細節(jié)理解。根據(jù)第五段中的“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.”可知，拍攝紀(jì)錄片的目的是了解狼是如何對生態(tài)有益的。故選D。 （3）考查細節(jié)理解。根據(jù)最后一段中的“The research is one more piece of evidence for why protecting these top predators is important not just for wolves as a species, but for hundreds of species at every level of an ecosystem.”可知，這項研究再次證明了為什么保護這些食肉動物不僅對狼這個物種很重要，而且對生態(tài)系統(tǒng)的各個層面的物種都很重要。故這項研究的意義在于它有助于證明保護狼的重要性。故選B。 （4）考查主旨大意。本文主要講述了人類以及其他動物對狼的恐懼對維持健康、平衡的生態(tài)系統(tǒng)是有益的，因為食草動物不會過度繁殖，從而保護了植物的生長。故選A。 【點評】本題考點涉及細節(jié)理解，詞義猜測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。7．閱讀理解 Experts note that an unhealthy lifestyle can put you at great risk of heart disease and stroke. So doctors urge us to eat healthy foods, get exercise, stop smoking and limit our alcohol intake. But there is something else you can do. And it is free and easy. Smile! Dr. Chockalingam, a heart disease specialist in Columbia, advises his patients to smile. He says a smile may be one way to help your heart. When we smile, the brain wiring changes. The chemicals that are released are more positive. He says smiling is the first step in fighting physical and emotional stress and its sometimes harmful effects on human health. This is not just New Age advice. Several studies support his opinion. When you feel stressed or under pressure, your body releases many natural hormones (荷爾蒙) including adrenaline and cortisol. Adrenaline increases your heart rate and blood pressure. Cortisol is the body39。s main stress hormone. It increases sugar in the bloodstream. If you are truly in danger, these hormones can help you. They are part of what we call our fightorflight response. However, when we are stressed for a long period, these stress hormones are everpresent in our bodies. And that, medical researchers warn, may lead to health problems. Researchers say the connection between stress and heart disease is still unclear. However, they claim that when people are stressed for long periods of time, they may have an unhealthy lifestyle, which can lead to health problems. Dr. Chockalingam says a smile may be one way to help. He tells his patients to smile 20 times an hour. To some, that might seem like a lot of smiling. Or some might even feel foolish ... smiling for seemingly no reason. But a smile does not involve drugs. It is not invasive like a surgical operation. It is free and it has no bad side effects. Once people smile, they are relaxing. This relaxation directly lowers blood pressure, improves sugar levels in the blood. If we are smiling, we are breaking that link between stress and health. And it just may provide a little extra protection to everyone39。s heart health.（1）Which of the following agrees with Dr. Chockalingam39。s opinion? has the same effects as laughter. can be used to take the place of medicine. is better than any healthy lifestyle to health. can make our body produce beneficial chemicals.（2）What can we know about the mentioned stress hormones? can lower our blood pressure. will surely lead to heart diseases. can benefit us when we are in danger. will make us live an unhealthy lifestyle.（3）Why does Dr. Chockalingam think smiling is helpful to our health? can make us relax. increases sugar levels. has little bad side effects. can happen for no reason.（4）What can be the best title for the text? Thorough Analysis of the Causes of Heart Diseases Thing You Can Do Right Now to Help Your Heart Thing That Is Closely Connected with Stress Hormones Clear Connection Between Unhealthy Lifestyles and Heart Diseases【答案】 （1）D（2）C（3）A（4）B 【解析】【分析】本文是一篇說明文，哥倫比亞的心臟病專家Chockalingam博士建議多保持微笑，他認為微笑可能是幫助心臟的一種方式。同時說明了微笑有利于健康的原因和人們感到壓力時的身體反應(yīng)等情況。 （1）考查細節(jié)理解。根據(jù)第二段中的“When we smile, the brain wiring changes. The chemicals that are released are more positive.”當(dāng)我們微笑時，大腦的線路會發(fā)生變化。釋放出的化學(xué)物質(zhì)更積極?？芍珻hockalingam博士認為微笑能使我們的身體產(chǎn)生有益的化學(xué)物質(zhì)。故選D。 （2）考查細節(jié)理解。根據(jù)第三段中的“If you are truly in danger, these hormones can help you.”如果你真的有危險，這些荷爾蒙會幫助你?？芍?，當(dāng)我們處于危險中時，壓力荷爾蒙可以幫助我們。故選C。 （3）考查細節(jié)理解。根據(jù)最后一段中的“If we are smiling, we are breaking that link between stress and health. And it just may provide a little extra protection to everyone39。s heart health.”如果我們微笑，我們就打破了壓力和健康之間的聯(lián)系。而且它可能會為每個人的心臟健康提供一點額外的保護?？芍?，Chockalingam博士認為微笑可以使我們放松，從而有利于我們的健康。故選A。 （4）考查主旨大意。根據(jù)第二段中的“Dr. Chockalingam, a heart disease specialist in Columbia, advises his patients to smile. He says a smile may be one way to help your heart.”哥倫比亞的心臟病專家Chockalingam博士建議他的病人保持微笑。他說，微笑可能是幫助心臟的一種方式。以及結(jié)合文章內(nèi)容主要介紹了微笑能夠讓我們放松進而有利于我們的健康，所以要健康那就要多微笑，所以選B。 【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(zhǔn)確掌握細節(jié)信息，并根據(jù)上下文的邏輯關(guān)系，進行概括和歸納，從而選出正確答案。8．閱讀理解 If you wear glasses, chances are you are smarter. Research published in the famous British journal Nature Communications has found that people who displayed higher levels of intelligence were almost 30 percent more likely to wear glasses. The scientists studied the genes of thousands of people between the ages of 16 and study showed intelligence can be connected to physical characteristics. One characteristic was eyesight. In out of 10 people who were more intelligent, there was a higher chance they needed glasses. Scientists al