2020届人教版高考英语必修4知识串讲：unit2 5页

‎-人教版必修四-unit 2‎ ‎【基础词汇】‎ ‎1.statistic n. 　数据;统计;统计数字;统计资料　 ‎ ‎2.sunburnt adj. 　晒黑的　　‎ ‎3.super adj. 　特级的;超级的　 ‎ ‎4.output n. 　产量;输出  ‎ ‎5.crop n. 　庄稼;农作物;产量　 ‎ ‎6.grain n. 　谷物;粮食;颗粒　 ‎ ‎7.occupation n. 　工作;职业;占领　 ‎ ‎8.production n. 　生产;制造　 ‎ ‎9.pest n. 　害虫;害兽;害鸟　 ‎ ‎10.nutrition n. 　营养;滋养;食物　 ‎ ‎11.mineral n. 　矿物;矿石  ‎ ‎12.soil n. 　土壤　 ‎ ‎13.root n. 　根;根源  ‎ ‎14.skim vt. 　浏览;略读　 ‎ ‎15.underline vt. 　画底线标出;强调　 ‎ ‎16.summary n. 　总结;摘要;概要　 ‎ ‎【高频词汇】‎ ‎1.　struggle　 vi.&n.斗争;拼搏;努力 ‎ ‎2.　decade　 n.十年;十年期 ‎ ‎3.　battle　 n.战役;战斗;较量;斗争 vt.&vi.搏斗;奋斗 ‎ ‎4.　rid　 vt.摆脱;除去 ‎ ‎5.　therefore　 adv.因此;所以;因而 ‎ ‎6.　regret　 vt.遗憾;惋惜 n.遗憾;懊悔 ‎ ‎7.　focus　 n.焦点;中心点 vt.集中;聚集 ‎ ‎8.　reduce　 vt.减少;减缩 ‎ ‎9.　comment　 n.评论;议论 vi.&vt.表达意见;作出评论 ‎ ‎【核心词汇】‎ ‎1.hunger n.饥饿;欲望→hunger v.渴望得到;渴求→hungry adj.饥饿的 ‎2.　disturbing　 adj.引起烦恼的;令人不安的→　disturb　 vt.扰乱;打扰→　disturbed　 adj.被扰乱的;精神失常的 ‎ ‎3.　expand　 vt.&vi.使变大;伸展→　expansion　 n.扩大;膨胀 ‎ ‎4.　circulate　 vt.&vi.循环;流传→　circulation　 n.循环;流通 ‎ ‎5.　freedom　 n.自由;自主→　free　 adj.自由的;免费的→　‎ freely　 adv.自由地;随意地 ‎ ‎6.　equip　 vt.&vi.配备;装备→　equipment　 n.装备 ‎ ‎7.　bacterium　 n.细菌→　bacteria　复数形式 ‎ ‎8.　export　 vt.&vi.输出;出口→　export　 n.输出;输出品→　‎ import　 n.进口品→　import　 v.进口;输入 ‎ ‎9.　nationality　 n.国籍→　nation　 n.国家;民族→　‎ national　 adj.国家的;民族的→　nationwide　 adj.在全国范围内的 ‎ ‎10.　confuse　 vt.使迷惑;使为难→　confused　 adj.糊涂的→　‎ confusing　 adj.令人困惑不解的→　confusion　 n.混乱;迷惑 ‎ ‎11.　chemical　 adj.化学的;关于化学的→　chemistry　 n.化学→　‎ chemist　 n.化学家;药剂师 ‎ ‎12.　discovery　 n.发现;发觉→　discover　 vt.发现;发觉 ‎ ‎【词汇联想】‎ ‎1.“评论”单词知多少 review n.复习;评论 comment n.评论;议论 remark n.评论 criticism n.批评 ‎2.“扩展”词汇全接触 spread v.扩展;蔓延;传播 enlarge v.扩大;放大 expand v.扩展;扩张;膨胀 extend v.延伸;扩大 ‎3.-dom后缀名词一览 kingdom王国 freedom自由 wisdom智慧 ‎4.equip用法小结 动词变化形式:‎ equipped;equipped;equipping equip...with...用……装备……‎ be equipped with装备着……‎ be well/poorly equipped设备精良/较差 equip...for sth./to do sth.为了……而装备 ‎5.由reduce想到的 reduce...by...降低了……‎ reduce...to...降低到……‎ increase...by...增加了……‎ increase...to...增加到……‎ decrease...by...减少了……‎ decrease...to...减少到……‎ ‎6.由discover想到的 look for寻找 find找到 discover发现(强调首次发现)‎ invent发明 ‎【短语】‎ ‎1.rid...of 使……摆脱或除去 ‎2.would rather 宁愿;宁可 ‎3.keep...free from/of 使……免受(影响;伤害等);使……不含(有害物)‎ ‎4.over time 随着时间的流逝 ‎1.幸亏;由于;因为 thanks to ‎2.对……感到满意 be satisfied with ‎3.逐渐增强;建立;开发 build up ‎4.导致;造成(后果)lead to ‎5.集中(注意力、精力等)于 focus on ‎6.每几年 every few years ‎【短语联想】‎ ‎1.“导致”短语 lead to导致;造成 bring about导致;引起 result in导致;结果是 contribute to促成;有助于 account for解释;导致 ‎2.与focus on结构相同的短语 call on号召 concentrate on集中;全神贯注于 count on依赖 depend on依赖 live on以……为食 ‎【句式】‎ ‎　If so　,what did you do to grow them? ‎ 如果是这样的话,你怎样来种植这些植物?‎ 考点提炼if so “如果这样的话”,是if 引导的条件状语从句的简略形式,表示肯定意义;如果表示否定意义,则用if not。‎ ‎【仿写句子】‎ ‎1.他们认为他可能来电话,如果那样的话,就要有人守在这里。‎ They think he may try to phone.If so,someone must stay here.‎ ‎2.如果可能的话,尝试每天在同一时间睡觉和起床。‎ If possible,try to go to bed and wake up at the same time every day.‎ ‎【语篇填空】‎ ‎　　Yuan Longping was born in 1930.1.　Since　 he graduated from Southwest Agricultural College in 1953,he has devoted his life to 2.　finding　(find)ways to grow more and more rice.As a young man,he saw the great need for increasing the rice output.At that time,hunger was 3.　a　 serious problem in many parts of the countryside.Yuan Longping searched 4.　for　 a way to increase rice harvests without expanding the area of the fields.In 1950,Chinese 5.　farmers　 could produce about fifty-six million tons of rice.In a recent harvest,however,‎ ‎6.　nearly　 two hundred million tons of rice was produced.‎ These 7.　increased　(increase)harvests mean 8.　that　 22% of the world’s people are fed from just 7% of the farmland in the world.Yuan Longping is now circulating his knowledge in India,Vietnam and many other 9.　less　(little)developed countries to increase their rice harvests.Thanks to his research,the UN 10.　has　(have)more tools in the battle to rid the world of hunger.Using his hybrid rice,farmers are producing harvests twice as large as before. ‎