任务型读写（共10小题；每小题1分，满分10分）阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每空格只填一个单词。As m,高中三年级,英语试题,序数词考点,好技网

阅读理解

任务型读写（共10小题；每小题1分，满分10分）
阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。
注意：每空格只填一个单词。
As more students begin to use computers for longer periods of time, more of them are suffering from eyestrain （视疲劳）．Just a few hours in front of a computer screen can make a person’s eyes feel tired and painful．A number of eye doctors have studied this growing problem and have found ways to deal with it．Following their advice will help keep computer users more comfortable．Here is some of the advice．
The light in a room shouldn’t be brighter than the computer screen itself．In many classrooms, however, the lights are far brighter than they should be．．Students can block some of this light by wearing baseball caps if they’re allowed at school．
A special computer screen should be used to cut down on bright light because it is especially tiring to the eyes．Another problem to avoid is the wrong kind of contrast．It is best to have dark letters on a light background．This causes less eyestrain than light letters on a dark background．
Students should be seated so that they are looking down at the computer screen rather than straight ahead, which is a far more tiring angle．The top of the monitor should be slightly lower than the top of the head．
The length of time students spend in front of a computer screen leads greatly to eyestrain．Students should take frequent breaks by looking away from the screen every fifteen or twenty minutes．During that time they should either close there eyes or focus on an object at a distance. Long – term computer use can dry out the eyes, so students should remember to blink frequently while in front of the screen.
Title: Computers and Eyestrain
Common Problems Doctor’s小题1:
Room
lighting     Much brighter in many classrooms          Get the light小题2:   bright.
小题3:       something to block the light.
The screen       Too bright light.
Wrong kind of contrast.
Light letters.   小题4:      the strong light.
Use the 小题5:       kind of contrast.
Have dark letters on a light background.
小题6:      The top of the screen
小题7:      than the top of the head. Sit were you won’t look小题8:    at the serene.
Time        Spending too much time
小题9:     a computer screen.   小题10:      your eyes for a moment.
Look at something at a distance.
Blink often while using a computer.

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本试题 “任务型读写（共10小题；每小题1分，满分10分）阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每空格只填一个单词。As more students beg...” 主要考查您对
序数词
等考点的理解。关于这些考点您可以点击下面的选项卡查看详细档案。

序数词

序数词的概念：

表示顺序的数称为序数词。如：first, second, 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
           seven＋th→seventh
           ten＋th→tenth
②下面这些基数词在变为序数词时，有特殊的变化。
例：one→first
        two→second
        three→third
        five→fifth
        eight→eighth
        nine→ninth
        twelve→twelfth
③十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→ninetieth
④两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－third

2、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 second 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 second floor. 我的房间在二楼。
        The first is larger than the secon.（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：seven-twelfths
       379/8：forty-seven 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：seven and three quarters

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