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高中二年级英语

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  • 完形填空
    任务型阅读(共10小题,每题1分,满分10分)
    请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填入最恰当的单词。
    注意:每个空格填1个单词。
    China’s Tianhe-1 has a computing speed of 2,507 trillion(万亿)calculations a second, making it the fastest computer in the world. It is also 40 percent faster than the world’s second fastest supercomputer, Cray XT5 Jaguar, in the US, kept at a national laboratory in Tennessee, according to the New York Times. Jack Dongarra, a University of Tennessee computer scientist, told NYT that the Chinese supercomputer is faster than the existing Number One machine.
    Building the fastest supercomputer has become a source of national pride, as these machines are valued for their ability to solve problems in areas like defense, energy and science. These problems are related to national interests. Supercomputing technology is also found in business. Oil and gas companies use supercomputers to find oil and gas.
    Obviously, research centers with large supercomputers attract top scientific talents. This adds extra importance to the machines—they’re more than just huge computers.
    China’s new supercomputer will be used to speed up greatly scientific calculations, such as hurricane and tsunami modeling, cancer research, car design and even studying stars.
    In 2008, two US scientists put together a step-by-step guide on how to build a supercomputer using PlayStation 3 video-game consoles(控制台). Modern supercomputers are built by combining thousands of small computer servers(服务器)and using software to turn them into one large computer. Really, any organization with enough material and technology can create a fast machine.
    The Chinese system follows that model by linking thousands upon thousands of computer servers. But the secret behind the system—and the technological achievement—is China’s own networking technology. “That technology was built by them,” Dongarra said. “They are taking supercomputing very seriously and using a lot of time and money.”
    “China is still a developing country,” said Sha Chaoqun, manager at Dawning Company which is the leading supercomputer maker in China. “Maybe one day, China’s total computing power can be greater than that of the US, but there is still a long way to go before we get there.”
    Paragraph outline
    Supporting details
    China has developed the world’s fastest supercomputer.
    ◇Tianhe-1 has a high computing speed, which (1)__________ it the fastest computer in the world.
    ◇Tianhe-1 is 40 percent faster than the (2)__________ fastest supercomputer in the world.
    ◇(3)__________ Jack Dongarra, we learn that the Chinese supercomputer is faster than the existing Number One machine.
    Many countries see the fastest supercomputer as a source of national (4)__________ and are making efforts to develop it.
    ◇The high-speed computer is (5)__________ to solve problems related to national interests.
    ◇Besides (6)__________, supercomputing technology can also be found in areas of defence, energy and science.
    ◇It’s obvious that top scientific talents are (7)__________ to research centers with large supercomputers.
    The secret behind supercomputers is networking technology.
    ◇By using the technology built by Chinese people, taking it (8)__________ and devoting lots of time and money, China has achieved a lot.
    Mr. Sha showed a conservative(保守的) (9)__________ toward the development of computing power.
    ◇(10)__________ the greater computing power China may have in the future, there is still a long way to go.

    本题信息:英语完形填空难度一般 来源:未知
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本试题 “任务型阅读(共10小题,每题1分,满分10分)请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填入最恰当的单词。注意:每个空格填1个单词。China’s Ti...” 主要考查您对

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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