Believe it or not, cell phones have been around for over a quarter of a century.

题文

Believe it or not, cell phones have been around for over a quarter of a century.The first commercial cell phone system was developed by the Japane in 1979. But cell phones have changed a lot since that time. The early cell phones appeared big and heavy but they have developed into small and light palm­sized models. There have been huge developments in their functions，too. We have had call forwarding, text messaging, answering rvices and hands­free u for years, but now the manufacturers equip countless new facilities, such as instant access to the Internet and receiving and Sending photos.Cell phones have become very common in our lives；recent statistics suggest as many as one in three people on the planet now has a cell phone, and most of them say they couldn't live without one. Cell phones are ud in every area of our lives and have become a necessary tool, ud for esntial arrangements, social contact and business. They have made it easier to call for help on the highway. They have made it possible to keep in touch with people “on the move” when people are traveling.Cell phones have made communication easier and have reduced the need for family arguments. We can u cell phones to let our family know we'll be late or if there's a change of plan or an emergency. Cell phones have ead the worries of millions of parents when their teenagers are out late, and they can now contact their children at any time.This does not mean that cell phones are all good news. They have brought with them a number of new headaches for their owners: it costs a lot to replace stolen phones, something that is becoming a frequent occurrence, and have you ever en such huge phone bills? More rious, however, is the potential health problem they bring: there are fears that radiation from the phones may cau brain tumor(肿瘤). This may be a time bomb waiting to happen to younger people who have grown up with cell phones that they simply can't live without.

解析

小题1:history [归纳概括题。根据右边所列内容可知，这里讲的是手机的历史。]小题2:appearances [根据第一段第四句话，经过转述可知答案。]小题3:equipped [根据第一段最后一句话，经过转述可知答案。]小题4:necessity [根据第二段第二句话，经过转述可知答案。]小题5:business [根据第二段第二句话可知答案。]小题6:reduce [根据第三段第一句话可知答案。]小题7:contact [根据第三段最后一句可知答案。]小题8:．Problems/Disadvantages [根据右边所列内容可知，这里讲的是手机会带来的问题或手机的不利之处。]小题9:costly/expensive [根据最后一段第二句话，经过转述可知答案。]小题10:potential [根据最后一段第三句可知答案。]

考点

据考高分专家说，试题“Believe it or not, c.....”主要考查你对 [序数词 ]考点的理解。 序数词

序数词的概念：

表示顺序的数称为序数词。如：first, cond, third, fourth。

序数词的构成与用法：

1、序数词的构成：①一般来说，是由相应的基数词加词尾th构成。   例：four＋th→fourth   six＋th→sixth    ven＋th→venth   ten＋th→tenth②下面这些基数词在变为序数词时，有特殊的变化。例：one→first    two→cond    three→third    five→fifth    eight→eighth    nine→ninth    twelve→twelfth③十位整数序数词的构成方法是将基数词的词y变成i，然后再加eth。例：twenty→twentieth    thirty→thirtieth    forty→fortieth    ninety→ninetieth④两位或两位以上的基数词变成序数词时，仅将个位数变成序数词。例：twenty－one→twenty－first    thirty－five→thirty－fifth    a hundred and fifty－three→a hundred and fifty－third2、序数词的用法：①序数词在使用时，一般加上定冠词。例：the first book    the cond floor    the third day    the fourth week．②序数词在多数情况下都用作定语，有的也可以作表语、主语和宾语。例：The may1st is Labour Day. 五月一日是劳动节。    My room is on the cond floor. 我的房间在二楼。    The first is larger than the con.（主语）第一个比第二个大。    Read the book from the first.（宾语）从开头读这本书。    You'll be the sixth to write.（表语）你将是第六个写的。③序数词的前面可以加上不定冠词，用来表示“再一”，“又一”的意思。例：You may have a third try. 你可以第三次尝试。

序数词知识体系：

 

约数的表达方法：

用tens/dozens/scores/hundreds/thousands/millions of 表示“几十、几百、上千、成千上万”等。 如：The boy bought dozens of pencils.       Thousands of people died in the earthquake. 注意： (A)：dozen, score, hundred, thousand, million等表示确切数量时，不用复数。 如：five dozen (of) eggs   五打鸡蛋    hree hundred people  三百个人

分数词的构成和用法：

1）分数词构成法：分数词（FractionalNumerals）由基数词和序数词构成，基数词代表分子，序数词代表分母。除了分子为1的情况下，序数词都要用复数形式：如：1/4：one-fourth    5/9：five-ninths    2/3：two-thirds   17/5：three and two-fifths   7/12：ven-twelfths   379/8：forty-ven and three-eighths此外还有下面表示法：如：1/2：a(one) half    1/4：a(one) quarter    3/4：three-quarters    9/4：two and a quarter    3/2：one and half     31/4：ven and three quarters