1、Unit 20 New Frontiers基础知识梳理词汇梳理1. _ n. 细菌2. _ n. 全体机组人员3. _ vt. 帮助；协助_ n. 帮助_ n. 助手4. _ adj. 技术上的5. _ n. 消遣；娱乐6. _ n. 事业；企业7. _ adj. 方便使用的8. _ vt. 下载,9. _ vt. 更新10. _ n. 饥饿_ v. 挨饿11. _ n. 歧视；差别对待12. _ n. 争执；冲突13. _ n. 平等_ adj. 平等的14. _ n. 数据库；资料库15. _ adj. 电子的16 _ n. 专家17. _ vt. 呈现；介绍_ n. 呈现；介绍；引荐,1
2、8. _ n. 电子程序编制员19. _ vt. 拯救；救援20. _ adj. 起初的；最早的21. _ adj. 操作中的；即可使用的22. _ n. 指导者；教练_ v. 指导；教授23. _ n. 困境；进退两难的窘境24. _ vi. 通信25. _ adv. 同时26. _ vi. 分开；分离27. _ adj. 直言的；坦率的,28. _ n. 后果；结果29. _ vi. 努力解决；摔跤；搏斗30. _ n. 界限；边界31. _ n. 现象_ pl. 现象32. _ adj. 原始的33. _ adj. 长久的；永久的_ adj. 暂时的；临时的34. _ vt. 允许；准许
3、_ n. 允许35. _ vi. 打喷嚏,36. _ v. 嗅；闻37. _ vi. (使)成熟38. _ vt. 按；压39. _ n. 小伙子；电动剃须刀40. _ adj. 有毒的_ n. 毒药41. _ vt. 宣告；宣布,自我校对1.bacteria 2.crew 3.assist； assistance； assistant 4.technical 5.recreation 6.enterprise 7.handy 8.download 9.update 10.starvation； starve 11.discrimination 12.conflict 13.equality；
4、 equal 14.database 15.electronic 16.specialist 17.present； presentation 18.programmer 19.rescue 20.original 21.operational 22.instructor; instruct 23.dilemma 24.correspond 25.meanwhile 26.split 27.outspoken 28.outcome 29.wrestle 30.boundary 31.phenomenon； phenomena 32.primitive 33.permanent； tempora
5、ry 34.permit； permission 35.sneeze 36.sniff 37.ripen 38.press 39.shaver 40.poisonous； poison 41.declare,短语梳理1. _ 预先 2. _ 泄露(秘密)3. _ 接收；接管4. _ 以防万一5. _ 弥补,自我校对1.in advance 2.give away 3.take over 4.in case 5.make up for,重点知识探究重点单词1. mass n. 质量；大量；大多数；群众There were masses of people in the shops yesterd
6、ay.昨天商店里人如潮涌。The masses have boundless creative power.群众有无限的创造力。,知识梳理a mass of / masses of 大量的in the mass 总体上；总的来说点津提示a mass of / masses of表示“大量的；许多的”之意；后面既可以接可数名词也可以接不可数名词。,探究练习The young dancers looked so charming in their beautiful clothes that we took _ pictures of them.A. many ofB. masses ofC. t
7、he number of D. a large amount of,【解析】 B 考查了masses of表示“大量的”之意的用法。many直接修饰名词；C项应改为a number of； a large amount of修饰不可数名词。,2. assist vt. 帮助；协助I was employed to assist the manager with his duties.我受雇协助经理工作。They had no maps to assist them.他们没有地图，很不方便。发散思维assistant n. 助手assistance n. 帮助,探究练习He has been _
8、 me for a long time and I am grateful to him for his kindness.A. assisted B. assisting C. assisting with D. assisted to,【解析】 B assist是及物动词，后面直接接宾语。故选择B项。句意:他好长时间以来一直帮助我，我很感激他的善意。,3.present vt. 呈现；介绍；出现；颁发；授予The company has decided it must present a more modern image.公司已经决定，必须展现出更加现代的形象。May I present
9、 my husband to you?请允许我向您介绍我的丈夫?On his retirement, colleagues presented him with a set of golf clubs.在他退休之际，同事们赠给他一套高尔夫球杆。,知识拓展present n. 礼物；现在；目前 adj. 现在的；当前的；出席的；到场的What can I get him for a birthday present?我给他送点什么生日礼物呢？Im sorry he is out at present.我很抱歉他这会儿不在。We do not have any more information a
10、t the present time.目前，我们没有进一步的消息。,知识梳理present sb. with sth.=present sth. to sb.把某物交给某人；向某人颁发某物present sb. to sb. 向某人介绍某人；引荐某人at present 目前be present at 出席,探究练习He intended to _ himself better at the interview but actually he behaved worse than expected.A. present B. express C. show off D. explain,【解析
11、】 A 由后句语境behave“表现；举止”可知，此处应用present表示“表现；呈现”之意的用法。句意：他原打算面试时表现得好一点，但事实上是他表现地比期望的要差一些。,4. rescue vt. (从危险等中)救出；营救 n. 拯救；救援The reporter rescued a child from drowning.那个记者挽救了溺水的小孩。Many volunteers came to the rescue after the earthquake.地震后很多志愿者都来帮助救援。There were three rescues from danger in one afternoon.在一个下午三人获救脱离危险。,
