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    The word dayhas two meaningsWhen we talk about the number of days in a yearwe are usingdayto mean 24 hoursBut when we talk about day and nightwe are usingdayto mean the time between sunrise and sunsetSince the earth looks like a ballthe sun can shine on only half of it at a timeAlways one half of the earth is having day and the other half nightA place is moved from day into night and from night into day over and over by the spinning(旋转)of the earthAt the equator(赤道)day and night are sometimes the same length(长度)They are each twelve hours longThe sun rises at 6o'clock in the morning and sets at 6o'clock in the evening

        For six monthsthe North pole is tilted(倾斜)toward the sunIn those monthsthe Northern Hemisphere(半球)gets more hours of sunlight than the Southern HemisphereDays are longer than nightsSouth of the equator nights are longer than daysFor the other six months the North Pole is tilted away from the sunThen the Southern Hemisphere gets more sunlightDays are longer than nightsNorth of the equator nights are longer than daysWinter is the season of long nightsSummer is the season of long days

    1When the Western Hemisphere is having daythe Eastern Hemisphere is having   

       Aboth day and night          Bday    

       Cneither day nor night        Dnight

    2A place is moved from day into night and from night into day over and over by      of the earth

       Athe pushing                Bthe pulling

       Cthe spinning                Dthe passing

    3At the equator day is as long as night    

       Asometimes                 Bnever

    Cwinter                     Dsummer

    4When the North Pole is titled toward the sunthe Northern Hemisphere gets       sunlight

       A1ess         Bmore       Call       Dno

    5When it is winter in China     

    Athe USA is tilted toward the sun

    Bthe South Pole is tilted away from the sun

    Cthe North Pole is tilted toward the sun

    Dthe North Pole is tilted away from the sun

    答案

    DCABD



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