【文章內(nèi)容簡介】 neeze. As a result, our immune system evolved to run in maximum amounts when we39。re happy, but to slow down dramatically when we39。re not. With this background in mind, Trivers supposed that older people evolved a strategy of turning this relationship on its head, being more focused on the positive things in life in an effort to enhance their immune functioning. This was helped along by their knowing much more about the world than younger adults, so they can deal with some of the unpleasant things in life more easily.（1）According to Robert Trivers, when our body needs extra energy, ______. A.muscles will respond to it by relaxing a little bitB.organs will speed up metabolic processes to answer itC.immune system will temporarily shut down to fulfill itD.brain will satisfy it by sharing optional metabolic output（2）In paragraph 3 this relationship most probably refers to the one between ______. A.experiences and related knowledgeB.happiness and biological evolutionC.immune function and healthD.optimism and length of life（3）What can be concluded from Robert Trivers39。 study? A.Younger people adopt strategies of handling tense situations from everyday life.B.Our ancestors evolved their immune systems in fighting against fierce animals.C.Realizing that their days are numbered, older people prefer being positive.D.Being negative drains energy from our body, lowering resistance to disease.（4）Which of the following is the best title of the passage? A.Brain, muscles and immune systemB.Age, health and happinessC.Ancestors, emergency and evolutionD.Energy, effort and response【答案】 （1）C（2）D（3）D（4）B 【解析】【分析】本文是一篇說明文，研究表明，老年人往往會(huì)記住生活中積極的事物，而不是消極的事物。十年前作者與生物學(xué)家羅伯特特里弗斯合作研究身體是如何使用能量的，他們的發(fā)現(xiàn)解釋了這一現(xiàn)象。 （1）考查推理判斷。根據(jù)第二段中的“We have an enormous number of immune cells coursing through our body, a momentary break from production is fine. So, when our body needs extra energy, one of the places it goes is our immune function.”可知我們的身體里有大量的免疫細(xì)胞，暫時(shí)停止運(yùn)作是可以的。因此，當(dāng)我們的身體需要額外的能量時(shí)，（我們的身體）會(huì)去找免疫系統(tǒng)。由此可以推斷，免疫系統(tǒng)會(huì)暫時(shí)停止來為身體提供額外的能量。選C。 （2）考查詞義猜測(cè)。根據(jù)第三段中的 being more focused on the positive things in life in an effort to enhance their immune functioning. 可知老人們更加關(guān)注生活中積極的事物，是為了增強(qiáng)他們的免疫功能。也就是說積極與免疫功能之間有關(guān)系，越積極，免疫功能越強(qiáng)，就能活得越久，所有選項(xiàng)中D項(xiàng)（樂觀與壽命）之間最切題，故選D。 （3）考查推理判斷。根據(jù)最后一段中的As a result, our immune system evolved to run in maximum amounts when we39。re happy, but to slow down dramatically when we39。re not.可知當(dāng)我們快樂時(shí)，我們的免疫系統(tǒng)進(jìn)化到最大程度，但是當(dāng)我們不快樂時(shí)，免疫系統(tǒng)會(huì)減弱。由此推斷，消極會(huì)消耗我們身體的能量，降低對(duì)疾病的抵抗力。選D。 （4）考查主旨大意。作者開頭提出老年人更關(guān)注積極的事情，后文提到積極的情緒會(huì)增強(qiáng)免疫系統(tǒng)，所以本文主要講的是年齡，健康與積極的情緒之間的關(guān)系，選B。 【點(diǎn)評(píng)】本題考點(diǎn)涉及推理判斷，詞義猜測(cè)和主旨大意三個(gè)題型的考查，是一篇科研類閱讀，考生需要根據(jù)上下文的邏輯關(guān)系，進(jìn)行分析，推理，概括和歸納，從而選出正確答案。4．閱讀理解 Some people sit outside for hours without getting bitten by mosquitoes, but it always seems like you39。re being eaten alive within minutes of stepping outdoors. If this is you, you39。re not alone. According to Smithsonian Magazine, around 20 percent of people in the world are especially tasty to mosquitoes. What about these people makes mosquitoes39。 mouths water? A popular myth claims that mosquitoes prefer certain blood types, but the fact is that they simply can39。t tell what your blood type is from a faraway place. Jonathon Day, a professor of medical entomology (昆蟲學(xué)) at the University of Florida in the US, told NBC it39。s not plicated. The two most important reasons a mosquito is attracted to you have to do with sight and smell. Mosquitoes are especially active in the late afternoon. While flying along, they use their sense of smell to find possible targets. They find victims (攻擊對(duì)象) by smelling the carbon dioxide (CO2) breathed out by humans and animals. That39。s why you monly find them in crowded streets and parks. Joop van Loon, an entomologist at Wageningen University in the Netherlands, told Live Science, Mosquitoes start orienting (使......朝向) themselves to carbon dioxide and keep flying upwind as they sense higher concentrations (濃度). As a result, people who simply exhale (呼出) more of the gas over time – generally, larger people – have been shown to attract more mosquitoes than others. This is why kids don39。t get bitten as much ... as adults, US professor Ted Rosen told Science Alert. This love for CO2 can also put pregnant women at increased risk for mosquito bites, as they tend to exhale 21 percent more CO2 than people of the same age and size who aren39。t pregnant. In addition to carbon dioxide, the color of the clothes you wear also plays a role in attracting mosquitoes. According to Live Science, mosquitoes can lock onto targets from up to 50 meters away. At this distance, what we wear has a huge effect. Due to their vision (視覺), people wearing dark colors are more likely to bee targets. Being bitten by mosquitoes is annoying, but don39。t worry. Some simple tips can help ward them off. Scientists remend that we use insect repellent (驅(qū)蟲劑) and wear lightcolored clothing.（1）How do mosquitoes locate their targets, according to the article? seeking out bright clothes. identifying different blood types. sensing an increase of carbon dioxide. following bigger crowds.（2）Why are pregnant women more likely to be bitten by mosquitoes? larger size helps mosquitoes to see them. breathe out more CO2. are more likely to sweat. body temperatures are higher.（3）How does the article advise you to avoid mosquitoes? regularly. lightcolored clothing. your skin dry and clean. indoors in the evening.（4）What39。s the article mainly about? new finding about mosquitoes. people can avoid mosquito bites. popular myth about mosquitoes. some people are more attractive to mosquitoes than others.【答案】 （1）C（2）B（3）B（4）D 【解析】【分析】本文是一篇說明文，介紹了為什么有些人可以整個(gè)夏天坐在戶外乘涼卻不被蚊子叮咬，而有些人一出門就好像要被蚊子吃掉一樣。 （1）考查細(xì)節(jié)理解。根據(jù)第四段中的“While flying along, they use their sense of smell to find possible targets. They find victims by smelling the