【正文】 isn39。free land used.B.D.C.B.in paragraph 3 probably mean? A.Not all the countries have remended diets in an explicit manner.D.for173。 Of course, people are notoriously bad at following diets. But: These nationally remended guidelines do actually have a knock173。ine countries, Behren39。s partly due to cow farts. Seriously.) Following the suggestions would also mean eating fewer calories, since many people here eat more than they need.caused greenhouse gas emissions. Fertilizer runoff also leads to other problems, like the algae blooms in Lake Eerie and the Dead Zone in the Gulf of Mexico.t mention explicitly—or most of them don39。根據(jù)第一段中的A single dose(劑量) of an experimental vaccine(疫苗) can protect mice against the Zika(寨卡) virus,可知，一種實(shí)驗(yàn)性疫苗可以保護(hù)小鼠免受寨卡病毒侵襲，由此可知，本文主要介紹的是寨卡病毒疫苗對(duì)小白鼠非常有效，故選A。 would still be years away可知，但是，即使這些進(jìn)展順利，一種廣泛用于保護(hù)高危人群的授權(quán)疫苗仍需數(shù)年時(shí)間，也就是說(shuō)如果人體試驗(yàn)進(jìn)展順利的話，短期內(nèi)仍無(wú)法獲得授權(quán)疫苗，故選C。More attention has been paid to Zika vaccine【答案】 （1）C（2）B（3）A 【解析】【分析】本文是一篇說(shuō)明文，介紹了科學(xué)家發(fā)現(xiàn)一種實(shí)驗(yàn)性疫苗可以保護(hù)小鼠免受寨卡病毒侵襲。works very well39。US scientists have tested more than two types of Zika vaccine in mice.C.pregnant women in Africa will be the first to benefit from the vaccine.C. Researchers say they will push ahead with developing the needed virus vaccine. There are many existing vaccines for other disease that use this type of technology, while there are relatively few DNA173。 Tests in humans could begin in months. But even if these go well, a licensed vaccine for widespread use to protect those at most risk 173。故選C。根據(jù)第三段中的The new material was lighter and... more likely to survive the Journey.可知A項(xiàng)和B項(xiàng)正確；以及After all, ... made the chalk powder easier to erase.可知C項(xiàng)正確；D項(xiàng)文章未提及。t draw the maps their teacher wanted on their tiny boards, so Pillans put several slates together to create a large board. ”在1800年，一名英格蘭校長(zhǎng)James Pillans想讓他的學(xué)生們畫(huà)地圖，但是學(xué)生們?cè)谒麄兊拿阅惆迳蠠o(wú)法畫(huà)出地圖，因此校長(zhǎng)讓學(xué)生把他們的迷你板拼湊在一起來(lái)制造一個(gè)大的板。故選D。Function of the blackboard.【答案】 （1）D（2）B（3）D（4）C 【解析】【分析】本文是一篇說(shuō)明文，通過(guò)描述黑板發(fā)展歷程向讀者介紹了黑板最早的時(shí)候確實(shí)是黑色的，隨后慢慢發(fā)展變成了綠色。s the main idea of the text? A.They39。They39。To draw students39。D.C.B.t plaining either. After all, the new greenboards made the chalk powder easier to erase. Plus, the enamel left less of a glare and the color was nicer to look at. At that point, people started using the word chalkboard as a more accurate descriptor, but blackboard still stuck around.（1）What did the late 18thcentury students use in class? A.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.s up with the name? Originally, blackboards were really black. Before wallsized blackboards existed, late 18thcentury students used their own mini boards made of slate (石板) or painted wood, according to Concordia University, Those first boards were, in fact, black, and they paved the way for the larger ones.故選C。故選A。me International d39。s foot ...around a centimetre shorter than the Belgic foot”和“Greek, Egyptian and Babylonian versions of water in a fixed container varied from one another by a few kilos,以及The lieue (former measure of distance), for example, varied from just over 3 km in the north to nearly 6 km in the south”可推知，本段作者主要運(yùn)用了對(duì)比的寫(xiě)作方法，把同一計(jì)量單位在不同國(guó)家之間或者在同一國(guó)家不同區(qū)域間的差異進(jìn)行了說(shuō)明。根據(jù)第一段中的“man has been the measure of many, if not all, things ”以及下文提到的用作計(jì)量單位的手、腳、谷物重量和參考角豆種子重量的磅可知，本段主要講述了不同的東西被用作計(jì)量單位。 At a meeting in Versailles, France, on November 16th, 2018, the world39。Unit233。 s ears to help them detect the sound of approaching insects.”及全文內(nèi)容可知，文章主要講述人與植物的交流可以促其生長(zhǎng)。從而推斷可知，園丁經(jīng)常與植物交談，生長(zhǎng)得更好。從而推斷可知，在叢林里的植物生長(zhǎng)得更好。故選B。s voices improve plants39。B.Plants respond to sounds slowly and ecologically.D.D.In the woods.D.Brighter color. response to bees39。 s ears to help them detect the sound of approaching insects.s evening primrose flowers39。Sweeter nectar.C.Beside a highway.C.Plants can only potentially hear animals.C.t grow without sound.Women39。根據(jù)第二段中的“When the researchers played recordings of flying bees to evening primrose flowers, within three minutes the sugar concentrations in the nectar (花蜜) of its flowers increased.”可知，蜜蜂飛到夜來(lái)香花，在三分鐘內(nèi)其花朵花蜜的糖的濃度會(huì)增加，所以花蜜會(huì)更甜。s ability to respond to pollinators may be weakened in city environments or beside a busy road. ”哈達(dá)尼教授認(rèn)為，植物對(duì)傳粉者做出反應(yīng)的能力可能會(huì)在城市環(huán)境或繁忙道路旁減弱。根據(jù)第四段中的“But the study, published on the openscience website BioRxiv, suggests the efforts of gardeners who talk to their plants may not be in vain.”研究表明，園丁們和他們的植物交談的努力可能不會(huì)白費(fèi)。根據(jù)第一段“Gardeners such as Prince Charles who claim that talking to plants encourages them to grow have long been seen as a little silly. But scientists have discovered evidence which suggests the Royal may actually be right and they could be listening to him. Biologists at Tel Aviv University in Israel have found that flowers can act as a plant39。2．犇犇閱讀下列短文，從每題所給的A、B、C和D四個(gè)選項(xiàng)中，選出最佳選項(xiàng)。 Throughout much of human history, man has been the measure of many, if not all, things. Lengths were divided up into feet and smaller units from the human hand. Other measures were equally characteristic. Mediterranean traders for centuries used the weight of grains of wheat to define (定義) their units of mass. The Romans used libra, forerunner of the pound, by referring to the weight of a carob (角豆樹(shù)) seed.s foot, used in France for nearly 1, 000 years after its introduction by Charlemagne in around 790 AD, was, at , around a centimeter shorter than the Belgic foot, used in England until , Egyptian and Babylonian versions of water in a fixed container varied from one another by a few kilos, Nor was there agreement on such things within countries. In France, where there