Unit 4 Topic 2-2021-2022九年级英语上册知识点精讲精练+ABCD每课作业（仁爱科普版）

Unit 4 Amazing Science Topic 2 I’m excited about the things that will be discovered in the future 第一部分 知识点精讲精练 一、词汇拓展记忆 1．description _____________(动词) 2．dancer _____________ (动词) 3．weigh _____________ (名词) 4．generally _____________(形容词) 5．excitement ______________ (动词) __________ _________ (形容词) 二、重点词组短语 1．在太空in space 2．火星上on Mars 3．在外层空间，外太空in outer space 4．以……命名name after 5．相隔at a distance of 6．被……覆盖be covered by 7．登上火星land on Mars 8．进展顺利go well 9．淋浴have a shower 10．值得做某事be worth doing 11．搜寻search for 12．因某事/物佩服某人admire sb.for sth. 三、知识点解析 1．They are reading information on the Internet in order to learn human culture.他们在因特网上阅读信息为了了解人类文化。 in order to为了，以便，目的是 She arrived early in order to get a good seat.她早早到场，好找个好位置。 in order to后接动词原形，in order that 后接从句，都可用于表示目的。order的其他常用短语有：May I take your order? “你要点餐吗？”， order sb.to do sth.“命令某人做某事”， in order “按顺序，有序地” 等。 【即学即练】 ①________ get a complete picture，further information is needed. A．In order that B．So that C．In order to ②Please close the door ________ we may have some privacy. A．in order that B．in order to C．in order 2．Then our dream will be realized.那么我们的梦想将会实现。 realize v．意识到，领会；实现 I don’t think you realize how important this is to her.我认为你没有意识到这对她是多么重要。 (1)realize是及物动词，意为“意识到，实现(梦想)”，主语是人，后也可接that从句，如：I realized that he needed help at that time.我注意到那时他需要帮助。 (2)achieve是及物动词，常指通过努力实现目标或取得成绩，主语通常也是人；come true是不及物动词短语，主语常是梦想、计划、蓝图等，如：He had finally achieved success.他终于获得成功。 【即学即练】 ①He did not ________(意识到) his mistakes. ②I think your dream will ________________________________(实现) some day. 3．...53% as wide as...宽是……的53%。 This bridge is three times as long as that one.这座桥是那座桥的三倍长。 倍数的表达： (1)“A＋倍数＋as＋形容词或副词的原级＋as＋B”，表示“A是B的多少倍大(长、宽、高等)”； (2)“A＋倍数＋形容词或副词的比较级＋than＋B”，表示“A比B大(长、高、宽等)多少倍”。 【即学即练】 这间房子是那间的两倍大。 This room is ______________ large ________ that one. 4．So a person who weighs 90 kilos on earth weighs only 36 kilos on Mars.所以一个在地球上重90公斤的人在火星上只有36公斤重。 weigh v．称；称……的重量 They weigh about 1,000 pounds.它