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高中二年级英语

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  • 阅读理解
    根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。(★★请将答案填涂在答题卡上。 E="AB  " F="AC  " G=AD)
    In our modern society, we have to rely on different kinds of services. 1________.Without packaging, many goods, especially food, could not reach consumers. Packaging prevents perishable(易坏的) food from early rot. As a result , it makes shelf life longer and makes distribution possible to a greater distance .
    The function of waste reduction is also evident in food packaging. According to a scientific report, food wastage can be as high as between 20% and 50% in some areas because of poor or lack of packaging . 2________.It is estimated that for every 1% increase in packaging materials ,food wastage decreases by about 1.6%.
    Apart from practical functions, modern packaging also has aesthetic(美学的) value. 3_______.And for the consumers, this makes shopping more enjoyable.
    4________.Sometimes, people cannot help but feel puzzled by the huge packaging of some goods, which often prove to have nothing to do at all with the protection of the goods inside. Such packaging can only lead to misunderstanding and waste of money of the part of the comsumers. 5_______
    Perhaps it is difficult to decide whether the service of packaging has more advantages or disadvantages. It seems quite obvious that modern packaging , to a certain degree, reflects the inner quality of the people or company who produce the products.
    A. Appropriate packaging can cut this number down to only 2 to 3%.
    B. Packaging is just one of them.
    C.Goods are made more attractive and inviting.
    D. People are sometimes unwilling to spend more money on packaging.
    E. And more seriously, it can cause a great deal of damage to the environment.
    F. However, the service of packaging does not always enjoy a good reputation.
    G. Advantages and disadvantages of packaging have been well argued.

    本题信息:英语阅读理解难度一般 来源:未知
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序数词

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  • 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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