Nokia has    a family    of low-cost mobile phones based on Google's Android operating system.
A.performedB.operatedC.launchedD.instructed
C

試題分析:句意:Nokia根據(jù)谷歌的Android 操作系統(tǒng)發(fā)動實施了一系列的低成本移動電話。A. performed 表現(xiàn);B. operated運作;C. launched發(fā)射、實施;D. instructed指導(dǎo)。故選C。
考點: 考查動詞的用法。 
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