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    阅读理解

    　　Air quality in Shanghai worsened last week compared with the previous weeks, according to the latest report from the Shanghai Environment Monitoring Centre．

    　　The average air pollution index(API)for sulphur dioxide(SO2)remain almost unchanged from the previous week, but the APIs for nitrogen oxide(NO2)and total suspended(悬浮)particles(TSP)rose by 35 and 27 percent．

    　　The overall quality still belonged to class 2 category．Nitrogen oxide, caused mainly by vehicle exhaust and burning of cooking gas, was still the major pollutant of the week．

    　　The Shanghai Environmental Monitoring Centre operates six automatic air monitors in the city’s Putuo, Yangpu, Luwan, Hongkou, Jing’an and Xuhui districts．

    　　0～50：excellent

    　　51～100：good

    　　101～200：slight pollution

    　　201～300：medium pollution

    　　301～400：heavy pollution

    (1)

    Judging from the chart, on which day was the air quality the worst?

    [　　]

    A．

    October 13．

    B．

    October 14．

    C．

    October 17．

    D．

    October 18．

    (2)

    Which of the following can be used to describe the air quality of the week?

    [　　]

    A．

    Good．

    B．

    Seriously polluted．

    C．

    Excellent．

    D．

    Slightly polluted．

    (3)

    Six automatic air monitors are operated in the city except ________．

    [　　]

    A．

    Putuo District

    B．

    Xuhui District

    C．

    Chang’an District

    D．

    Hongkou District

    (4)

    In Shanghai, nitrogen oxide mainly comes from ________．

    [　　]

    A．

    the burning natural gas

    B．

    the burning cooking gas

    C．

    the burning coal

    D．

    dust raised by vehicles

    (5)

    This passage is obviously taken from ________．

    [　　]

    A．

    a magazine about air pollution

    B．

    a scientific report from TV

    C．

    the weather column in a newspaper

    D．

    the traveling guide to Shanghai

    答案：1．B;2．A;3．C;4．B;5．C;
    解析：

    (1)

    根据上面图表可知，只有在10月14日NO2含量最高。

    (2)

    根据图表数据可知，本周NO2含量平均值在100以下；其他的平均值也在50左右，所以，本周的空气质量标准在50～100之间。

    (3)

    细节理解题。根据“The Shanghai Environmental Monitoring Centre operates six automatic air monitors in the city’s Putuo, Yangpu, Luwan, Hongkou, Jing’an and Xuhui districts”可知C项不属于监测范围内。

    (4)

    细节理解题。根据“caused mainly by vehicle exhaust and burning of cooking gas”可知，二氧化氮主要来自汽车尾气和煤气的燃烧。

    (5)

    常识题。空气质量方面的变化是经常的，所以应出现在更新性强的报纸中。


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