Unit 1 Period 1 单元知识详解(精品课件)- 高二英语上学期同步精品课堂（译林版2020选择性必修第一册）

Unit 1 Food matters Period 1 单元知识详解 译林版英语选择性必修一 1.combination n.结合体,联合体;联合,混合 【知识微练】 单句语法填空 ①(2022·全国甲卷) It’s a pretty hard ____________ (combine) to beat. ②A few reasons combined ________(ruin) our plan.  ③The new modern hotel combines comfort __________ convenience.  完成句子 ④We are studying a new product ___________________other companies.  我们正在和其他公司一起研究新产品。 combination to ruin and/ with in combination with 【重点知识】 【知识拓展】 (1)a combination of A and B　 A与B的结合 (2)in combination with 与……结合;与……联合 (3)combine...with/and.... 把……和……结合 (4)combine to do sth. 联合做某事 2.vary vi. (根据情况)变化,变更;相异, 不同 vt. 变更,改变 【知识微练】 单句语法填空 ①Ocean colour _______(vary) from green to blue, depending on the type and concentration of phytoplankton(浮游植物). ②A company might want to develop a ________(vary) of spaces in an office so staff can find privacy if needed, but also work in open areas for creative thinking. ③No matter what you like to do, there is a way to get involved in ________(vary) activities on Earth Day. 完成句子 ④Stopping distances for cars __________the speed they are travelling at.  汽车的停车距离随着它们行驶的速度而变化。 varies variety various vary with 【知识拓展】 (1)vary in...　　　　　 在……方面不同 vary from...to... 从……变化到…… vary from person to person 因人而异 vary with... 随……而变化 vary between...and... 从……到……不等 (2)various adj.各种不同的,多种多样的 in various ways 以不同方式 (3)variety n. (同一事物的)不同种类,多种式样 a variety of/varieties of 各种各样的 a variety of, varieties of后接可数名词复数作主语时,谓语动词用复数形式;后接不可数名词作主语时,谓语动词用单数形式。the variety of+复数名词,意为“……的品种”,作主语时,谓语动词用单数形式。 3.essential adj.必不可少的;本质的,基本的 【知识微练】 单句语法填空 ①(2022·北京高考)The result—an approach known as systems thinking—is now seen as _________ (essence)in meeting global challenges. ②___ essence, a firm belief is the key to success of revolution. ③It is