【正文】 ut it does mean you should probably head indoors.（1）What can be the best title for the text? A.s where water es in. In areas like the Central United States that get lots of tornadoes, there39。t concentrated only in big cities.”但是不要太激動。 （3）考查推理判斷。 （1）考查段落大意。5G helps to create the artificial intelligence vehicleC.The difference between 4G and 5G.D. Slowly but surely 故選D。 （2）考查推理判斷。Introduction of the blackboard.B.re lighter in weight.B.Mini board.（2）Why did the headmaster ask the students to put their mini boards together? A.Chalkboard.根據(jù)最后一段中的““ watts per square meter of area burned are soaked up by the earth from greenhouse gases, but watts per square meter will be sent back into space.”可知該詞與send back該詞相反的意思，故應(yīng)該指吸收，因為send back指反射。根據(jù)第二段中的“This finding suggests that taking steps to prevent northern forest fires to limit the release of greenhouse gases may warm the climate in northern regions”這樣的措施最終導(dǎo)致了北部地區(qū)的氣候變暖。suggest that the fires will speed up climate warming（4）The underlined phrase soak up in the last paragraph most probably means ________. A.protect the forests and the environment there（2）The following are all the immediate effects after a forest fire EXCEPT ________. A. Against the supposition that forest fires in Alaska, Canada and Siberia warm the climate, scientists have discovered that cooling may occur in areas where burnt trees allow more snow to mirror more sunlight into space.lead to a longer fire seasonD.suggest that people should take measures to protect the environmentD.created （1）考查細(xì)節(jié)理解。 （4）考查推理判斷。t draw the maps their teacher wanted on their tiny boards, so Pillans put several slates together to create a large board. Problem solved! From there, the idea spread quickly as teachers could finally show a concept to the whole class at one time. By 1815, the massive writing spaces were mon enough to earn their own name: blackboard.B.D.They39。s the main idea of the text? A.故選D。根據(jù)第三段中的The new material was lighter and... more likely to survive the Journey.可知A項和B項正確；以及After all, ... made the chalk powder easier to erase.可知C項正確；D項文章未提及。s lots of data behind that task, which is why we need high speed.s Mobile World Congress how smart glasses could bee faster and lighter with a 5G connection, because instead of being weighed down with ponents, the glasses could rely on hardware for processing power.The expectation of 5G world.C.t e without AR glassesB.The importance of infrastructure construction.【答案】 （1）A（2）C（3）D（4）A 【解析】【分析】本文是一篇說明文，介紹了我們離5G世界越來越近了。故選C。s still a lot of work to be done in the meantime, including various trials to make sure the radios play nicely with hardware and infrastructure construction so 5G isn39。s still some green and even blue light hidden in there, just far less than the other colors. But for us to notice the remaining green light, it needs to hit something that reflects green light much better than red. That39。t necessarily mean there39。Because blue light is bounced all over the sky.D.Blue light. （1）考查主旨大意。s still some green and even blue light hidden in there, just far less than the other colors.”可知，選A。 You know those nutrition guidelines the government issues every few years? It turns out that following them isn39。t explicitly mention—environmental impacts, that you are going to have lower environmental impacts due to that. So that39。s team estimates that following the rules could result in as much as a 17 percent reduction in land use, a 21 percent reduction in nutrient pollution, and a 25 percent drop in agricultural greenhouse gas emissions. Cutting down on how much food we waste—which is roughly a third in the US—could help even more. The results are in the Proceedings of the National Academy of Sciences.schools program then that39。Some high173。It is estimated that following dietary guidelines can lead to decrease in more land use than in nutrient pollution.C.impact nations, in general, you can see that, if you follow a nationally remended diet, despite the fact that these diets don39。肥料徑流也導(dǎo)致了其他問題，例如伊利湖的藻類爆發(fā)以及墨西哥灣的死亡區(qū)域。A選項的描述 糧食生產(chǎn)可導(dǎo)致約20%的人為造成的溫室氣體，而只使用了三分之一的無冰土地 正確，故選A。 Having conducted previous research in 2017 revealing that eating similar foods led to people feeling emotionally closer to one another, Dr Woolley and Dr Fishbach wondered whether the way in which food was served also had a psychological effect. They theorized that, on the one hand, sharing food with other people might indicate food scarcity（短缺）and increase a feeling of petition. However, they also reasoned that it could instead lead people to bee more aware of others39。B.To find out whether sharing food can get people close emotionally.（3）Why were participants asked to eat up the snack before the game? A.To hide the intention of the experiment.To avoid the distraction during the game.【答案】 （1）B（2）C（3）C 【解析】【分析】本文是一篇說明文，介紹了外交宴席的心理學(xué)根據(jù)第二段中的“However, they also reasoned that it could instead lead people to bee more aware of others39。 【點評】本題考點涉及細(xì)節(jié)理解題型的考查，是一篇科研類閱讀，考生需要準(zhǔn)確掌握細(xì)節(jié)信息，并結(jié)合題目要求，從而選出正確答案。 Aside from food web problems, animals face various other physiological challenges as their bodies adjust to lower oxygen levels. Chinese shrimp (蝦) move their tails less vigorously to preserve energy in lower oxygen environments. Some creatures, such as jellyfishes, are more tolerant of low oxygen than others are. But all animals will feel the impact of deoxygenation because they all have evolved their oxygen capacity for a reason, says Oschlies. Any drop in oxygen is going to damage survivability and performance, he says.（1）According to the first two paragraphs, what worries scientists the most? A.Salty water holds less gas in the increasingly warmer ocean.（3）What can be inferred from the passage? A.1