专题3. 选择性必修第1册Unit 5 --第2册Unit 1 -2021-2022学年高二英语寒假精讲精练（人教版2019）

选择性必修第1册　Unit 5 --第2册　Unit 1 Unit5 一．拓展单词 1．devote vt.把……献(给)；把……专用于；专心于→devotion n．献身；忠诚；热爱 2．convince vt.使相信；使确信；说服→convincing adj.有说服力的；使人信服的→convinced adj.确信的；坚信的 3．assumption n．假定；设定；(责任的)承担；(权利的)获得→assume v．假定；设想→assuming conj.假定；假设 4．consumption n．消耗；消耗量；消费→consume vt.消耗；消费；吃；喝→consumer n．消费者；用户；客户 5．salty adj.含盐的；咸的→salt n．盐 6．extension n．扩建部分；扩大；电话分机→extend vt.伸开；展开；延伸 7．chemical adj.与化学有关的；化学的 n．化学制品；化学品→chemistry n．化学 8．nutritional adj.营养(物)的→nutritious adj.有营养的；营养丰富的→nutrition n．营养；滋养 9．depth n．向下(或向里)的距离；深(度)→deep adj.深的→deepen vt.加深；(使)变深 二.核心短语 1．devote...to把……用于；献身；致力；专心 2．be comprised of包括；包含；由……组成(或构成) 3．deep down在内心深处；本质上；实际上 4．in turn相应地；转而；依次；轮流 5．for instance例如；比如 三．经典句式 1．Indeed，his slim but strong body is just like that of millions of Chinese farmers，to whom he has devoted his life. 确实，他瘦削但结实的身躯看起来和他为之奉献了一生的千百万中国农民一样。 2．However，what concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat. 然而，他最担忧的是农民们的收成不好，有时甚至严重缺乏食物。 3．Given that Yuan’s hybrids have made him quite wealthy，one might think he would retire to a life of leisure. 鉴于袁隆平的杂交水稻品种已经让他变得相当富有，有的人可能认为，他会退休过一种休闲的生活。 4．Today，it is estimated that about 60 percent of domestic rice consumption in China is comprised of crops generated from Yuan’s hybrid strains，and his strains have allowed China’s farmers to produce around 200 million tons of rice per year. 据估算，现在中国国内消费的稻米有大约60%来自袁隆平的杂交水稻品种形成的作物，这些品种(形成的作物)让中国农民每年能够生产出大约两亿吨稻米。 随堂练习 一.词形变化填空(用括号内所给词的适当形式填空) 1．He is so devoted to his English teaching that everyone admires him for his devotion.(devote) 2．His convincing argument convinced me of the truth of the story.In other words，I was convinced of the story.(convince) 3．By contrast，consumers in the developed countries consume the most energy in the world.(consume) 4．If you study chemistry，you will witness thrilling chemical reactions in experiments.(chemical) 5．We will discuss the problem in depth to deepen our understanding so that