2019-2020年高考英语一轮复习第一部分教材课文要点Module4SandstormsinAsia语篇解题微技巧外研版必修.doc

2019-2020年高考英语一轮复习第一部分教材课文要点Module4SandstormsinAsia语篇解题微技巧外研版必修推断句题(七选五)方法指导在七选五中对推断句的考查主要包括两个层面。1)段中推断句:做题时阅读空格前后的相邻内容,抓住体现逻辑关系的信号词(thus、therefore、however等),确定上下文并列、递进、转折、因果等关系。2)段尾推断句:阅读前文,锁定高频词或体现逻辑关系的信号词并且注意与下一段开头的衔接关系。典例引领 (xx课标)根据短内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两处为多余选项。Secret codes(密码)keep messages private. Banks, panies, and government agencies use secret codes in doing business, especially when information is sent by puter.People have used secret codes for thousands of years.1Code breaking never lags(落后)far behind code making. The science of creating and reading coded messages is called cryptography.There are three main types of cryptography.2For example, the first letters of “My elephant eats too many eels”spell out the hidden message“Meet me.”3You might represent each letter with a number, for example. Lets number the letters of the alphabet, in order, from 1 to 26. If we substitute a number for each letter,the message “Meet me”would read“13 5 5 20 13 5.”A code uses symbols to replace words, phrases, or sentences. To read the message of a real code, you must have a code book.4For example, “bridge”might stand for “meet”and“out”might stand for “me”.The message“Bridge out”would actually mean“Meet me.”5However, it is also hard to keep a code book secret for long. So codes must be changed frequently.A.It is very hard to break a code without the code book.B.In any language, some letters are used more than others.C.Only people who know the keyword can read the message.D.As long as there have been codes, people have tried to break them.E.You can hide a message by having the first letters of each word spell it out.F.With a code book,you might write down words that would stand for other words.G.Another way to hide a message is to use symbols to stand for specific letters of the alphabet.方法运用 语篇解读本文是一篇说明文。介绍了密码的用途、历史以及三种密码方式。1.D过渡句。上句提到:人们使用密码已经几千年了。下句提到:密码的破解从未太落后于密码的设定。由此可知D项符合语境,意为“只要有密码,人们就会尽力去破解它们。”2.E过渡句。上句提到:有三种主要的密码设定方式。下句提到:例如,“My elephant eats too many eels”的首字母就拼出了“Meet me”这一隐藏起来的信息。由此可知本句应该为一种密码的设定方式,根据下句举到的例子,可知E项正确,意为“你可以用每个单词的首字母拼写出一条信息,以此来隐藏它。”3.G主旨句。上段指出有三种主要的密码设定方式,上段已经提到了一种,本段应该指出另外一种。下文举例说明了用数字来代替字母的密码方式,由此可知G项能起到统领本段的作用,意为“另外一种隐藏信息的方式就是用符号来代替字母表中特定的字母。”4.F细节句。上句指出:要解读某个真实密码的信息,你必须要有密码本。本句是对上句的解释说明,结合下文举到的例子,可推断出本句主要解释如何利用密码本来破解隐藏起来的信息。F项符合语境,意为“拥有了密码本,你也许就能写出代表其他单词的单词。”5.A细节句。上文指出了利用密码本来破解密码的方式。A项是总结上文内容得出的结论,意为“没有密码本就很难破解密码”,而且根据下句“.it is also hard to.”的句型结构也可得知A项符合语境。