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    精英家教网 > 高中英语 > 题目详情

    Waves of red light are about twice as long as _______ of blue light.

    A．thoseB．that C．itD．Ones

    A

    解析试题分析：考查指示代词。句意：红光的波长是蓝光波长的两倍长。在比较级中，指代比较对象时，单数用that，复数用those，这里的比较对象是waves，故选A。
    考点：考查指示代词

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