【正文】 它們通過(guò)聞人和動(dòng)物呼出的二氧化碳來(lái)鎖定目標(biāo)；以及第五段中的“Mosquitoes start orienting themselves to carbon dioxide and keep flying upwind as they sense higher concentrations”蚊子開始飛向有二氧化碳的地方，當(dāng)它們感知到高濃度的二氧化碳時(shí)，就保持逆流飛行，可知，蚊子通過(guò)感知二氧化碳的增加來(lái)鎖定目標(biāo)。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(jué)), people wearing dark colors are more likely to bee targets. Some people sit outside for hours without getting bitten by mosquitoes, but it always seems like you39。學(xué)習(xí)有可能但又如此困難的東西，以至于不值得一個(gè)人為了達(dá)到目的而付出所有的努力。 （3）考查推理判斷。在某些類型的活動(dòng)中，人類的大腦在20歲早期處于巔峰狀態(tài),... 我們知道阿爾伯特 雖然政府發(fā)誓解決污染問(wèn)題，但周末的能見(jiàn)度低，數(shù)百架航班在周末改道、延誤和取消，學(xué)校和辦公室周一關(guān)閉，人們必須戴防污口罩，可知，新德里被嚴(yán)重的污染所籠罩。 （3）考查詞義猜測(cè)?？芍?，政府盡管發(fā)誓解決這種污染，但情況不僅沒(méi)有改變，反而更加嚴(yán)重，使得人們必須佩戴防毒口罩。 s most polluted city. （3）考查推理判斷。Elderly people leave the nursing home.D.Through a mobile robot.Through sensors. Currently, an estimated 50 percent of adults over the age of 85 need assistance with every day activities such as preparing meals and taking medication and the annual cost for this assistance in the US is nearly $2 trillion. With the number of adults over 85 expected to triple by 2050, researchers hope that technologies like RAS and the WSU smart home will relieve some of the financial strain on the healthcare system by making it easier for older adults to live alone.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(xiàng)研究再次證明了為什么保護(hù)這些食肉動(dòng)物不僅對(duì)狼這個(gè)物種很重要，而且對(duì)生態(tài)系統(tǒng)的各個(gè)層面的物種都很重要。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(shuō)明文，研究表明人類以及其他動(dòng)物對(duì)狼的恐懼對(duì)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(jìn)就是一個(gè)典型的例子。To study what good wolves can do to ecosystems.（3）What is the significance of the research? A.Notice.Expect.s First Digital Teacher Appears in Classroom最符合本文的標(biāo)題。故選D。根據(jù)第一段中的“They became the world39。Disapproving.（4）What might be the best title for the passage? A.Unclear.Doubtful.Optimistic.It can talk any topic for free.They could get close to smartphone screen.（2）What is the benefit of this twoway interaction? A. Nikhil Ravishankar believes that Willlike avatars could be a novel way to catch the attention of the next generation. He says, “I have a lot of hope in this technology as a means to deliver costeffective, rich, educational experience in the future.” （3）考查細(xì)節(jié)理解。By 2100, the sea level will have risen to a much higher level than now.【答案】 （1）B（2）C（3）D（4）D 【解析】【分析】本文是一篇說(shuō)明文，南極地區(qū)的拉森C冰架崩解形成了一座巨大的冰山A68 iceberg。The condition of animal species in Antarctica.（3）What can we learn about the A68 iceberg from the text? A.s ocean will be, on average, at least 60cm higher by the end of the century. However, it found that the process is accelerating, and more than three quarters of the acceleration since 1993 is due to melting ice sheets in Greenland and Antarctica, the study shows.（1）Why are the scientists eager to go to the iceberg? A. The calving of A68 provides us with a unique opportunity to study marine life as it responds to a huge environment change, she said. It is important that we get there quickly before the undersea environment changes as sunlight enters the water. A team of international scientists is due to set off for the world39。To study how the iceberg was formed.B.It is as big as London.B.冰山下面顯現(xiàn)的新的海洋生態(tài)系統(tǒng)為科學(xué)家提供了研究未知的海洋生物的機(jī)會(huì)。根據(jù)第一段中的“to reach a newly revealed ecosystem that had been hidden for 120,000 years below the Larsen C ice shelf.”到達(dá)一個(gè)新發(fā)現(xiàn)的在拉森冰架下面隱藏了12萬(wàn)年的的生態(tài)系統(tǒng)，可知選D。 While the start of a new school year is always exciting, this year was even more so for some elementary school students in Auckland, New Zealand. They became the world39。It can smile back.New Hightech Contributes to EducationB.s first kids to be “taught” by a digital teacher”可知，他們成為世界上第一批由智能機(jī)器人老師“教”的孩子。 （3）考查推理判斷。故選B。 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. 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.It proves wolves feed on hundreds of species.B. （1）考查詞義猜測(cè)。故這項(xiàng)研究的意義在于它有助于證明保護(hù)狼的重要性。D.It can cook for owners on its own.（3）What39。B.D.根據(jù)最后一段中的“ While we are still in an early stage of development, our initial results with RAS have been promising”可知，Minor對(duì)這款機(jī)器人的未來(lái)發(fā)展充滿信心、非常樂(lè)觀，故選C。 Air pollution in Indians capital surged to its worst levels in years, covering the city in a thick smog that has bee an annual publichealth emergency despite government vows to solve the problem.由此可判斷出政府幾乎沒(méi)有保護(hù)其公民免受嚴(yán)重污染。根據(jù)第五段中的“New Delhi, is engulfed each year as the weather cools and a thick haze builds up from the pollutants emitted from cars and coalbased power plants, swirling dust from construction sites and roads and smoke from crop stubble burning in neighboring states.”本句是說(shuō)新德里每年都籠罩在污染中。故選B。But in certain other types of activity (of which being an author is perhaps one), experience is more important than sharpness of brain, and there one usually finds that a person reaches his or her peak much later in life. 愛(ài)因斯坦在20到25歲之間做出了所有震驚世界的發(fā)現(xiàn)。根據(jù)第三段中的“Besides sharpness of brain and experience, here is another thing that is very important, and that is wisdom.... Leaning to be wise is basically learning what is not possible； and what is possible but so difficult that it is not worth all the trouble one has to go through to get there. Mostly, it is learning about human nature；how real people behave and react, as against how one would like them to behave and