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    精英家教网 > 高中英语 > 题目详情
    Some scientists think there are _______ 2，000 million flashes of lightning per year.
    A．in shortB．on averageC．as usualD．in total
    B

    试题分析：短语辨析。A简而言之；B平均；C和平时一样；D总共；句意:一些科学家认为每年平均有2千多闪电。故B正确。
    点评：不同的短语要放在上下文中进行辨析。本题要特别注意AD项，是经常考查的短语。
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