第20讲 选择性必修一 Unit 5 Using Language-【暑假辅导班】2021年新高二英语暑假精品课程（人教版2019）

【暑假辅导班】 2021年新高二英语暑假精品课程（人教版2019） 第20讲 选择性必修一 Unit 5 Using Language 【核心知识点讲解】 1. widespread adj. 分布广的, 普遍的, 广泛的 *Chemical pesticides and artificial fertilisers have been in widespread use in farming since the middle of the 20th century. 自20世纪中叶以来, 化学杀虫剂和人工肥料在农业中被广泛使用。 *(2019·浙江高考)Mclntyre and his colleagues documented a widespread death of big trees that was evident even in wildlands protected from woodcutting or development. Mclntyre和他的同事发现大树的广泛死亡, 即使在禁止砍伐和开发的野生土地上也很明显。 *Smart phones are widely used in the world. 智能手机在世界上被广泛使用。 【词块记忆】 (1)a widespread disease 　　 流行病 in widespread use 广泛应用 (2)widely adv. 广泛地, 大大地 2. essential adj. 完全必要的; 极其重要的 *They may look beautiful on the outside, but inside there is usually more water than essential minerals, and they often have less flavor as well. 它们外表看起来可能很漂亮, 但里面通常含水比必需矿物质多, 而且它们的味道也往往较淡。 *Before giving my opinion, I think it is essential to look at the argument of both sides. 在给出我的观点之前, 我想有必要看看双方的论据。 *(2019·江苏高考)The example in Paragraph 4 suggests that donators should take people’s essential needs into account. 第4段中的例子表明捐赠者应该考虑到人们的基本需求。 *(2019·天津高考)History is much more than the study of dusty old objects and events long past. It is an essential part of who we are today and who we will become. 历史不只是研究满是灰尘的古董和很久以前的事件。它还是搞清楚我们今天是谁和我们将成为谁的重要部分。 *Food is essential to life. 食物对生命是必不可少的。 【词块记忆】 be essential to/for 对……很重要 It is essential that . . . (should) do. . . “做……是完全必要的” It is essential for sb. to do. . . “对某人来说做……是完全必要的” 3. alternative n. 可供选择的事物 adj. 可供替代的, 非传统的 *As an alternative, some farmers have switched to organic farming, and many customers have turned to organic food when they shop at the local grocery. 作为一个选择, 一些农民已经转向有机农业, 而且许多顾客在当地杂货店购物时也转向了有机食品。 *In race for a sustainable alternative to plastic, Indonesia bets on seaweed. 在寻找一种可持续的塑料替代品的竞赛中, 印度尼西亚把赌注押在了海藻上。 *(2019·江苏高考)Many donators have rushed into fancy programmes without carefully assessing the relative long-term costs and benefits of alternative