【正文】 nationally remended diet can have similar impacts in different countries.B.s going to be based off a lot of detail that I get from the nationally remended guidelines. So while it might not necessarily be the case that people follow directly …they actually are quite influential on the preparation of other advice. for173。m developing a new healthy173。 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. The food we eat takes a big toll on the environment. A third of the ice173。s sort of fairly clear across all the high173。t mention explicitly—or most of them don39。 What we found is that impacts vary across nations, but in the high173。t just good for your health. It39。5．犇犇閱讀理解 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。根據(jù)第三段中的US scientists from the Walter Reed Army Institute of Research, the Beth Israel Deaconess Medical Center and Harvard Medical School tested two types of Zika vaccine in mice可知，美國(guó)科學(xué)家在白鼠身上只測(cè)試了兩種而不是兩種以上的寨卡病毒，故選B。 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。根據(jù)第二段中的But even if these go well, a licensed vaccine for widespread use to protect those at most risk 173。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。Zika vaccine still has a long way to goC.works very well39。It is still unknown whether the vaccine is safe and effective.（3）Which can be the best title for the passage? A.US scientists have tested more than two types of Zika vaccine in mice.C.The Zika virus will cause less serious birth defects during pregnancy in months.（2）Which of the following statements is NOT true? A.pregnant women in Africa will be the first to benefit from the vaccine.C.. A. 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。 would still be years away, experts advise. Zika has been spreading across Central and South America and, most recently, Africa. More than 60 countries and territories now have continuing transmission(傳播) of the disease, which is carried by mosquitoes. The virus causes serious birth damages during pregnancy and has been declared a global public health emergency. 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。4．犇犇閱讀理解 故選C。 （4）考查主旨大意。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。故選B。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)生們畫地圖，但是學(xué)生們?cè)谒麄兊拿阅惆迳蠠o(wú)法畫出地圖，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。根據(jù)第二段中的“故選D。 （1）考查細(xì)節(jié)理解。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。Origin of the blackboard.C.s the main idea of the text? A.They39。They39。They39。They39。To arouse students39。To draw students39。To make a parison.B.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. When you think back to the blackboard from your school days, what color is it? Chances are that it39。3．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)。故選C。根據(jù)最后一段中的“At a meeting in Versailles, France, on November 16th, 2018, the world39。故選A。s (SI, or the metric system, as it is better known)developed from it and became the official measurement in all countries except Myanmar, Liberia and the United States ”可知，在所給出的四個(gè)國(guó)家中，只有法國(guó)采用國(guó)際單位制(SI)。me International d39。 （3）考查細(xì)節(jié)理解。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。 （2）考查推理判斷。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。s measurement bodies achieve at the meeting held in Versailles? will e up with seven new SI units. will set May 20th as a new international festival. will redefine four SI units includ