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7.If steel is heavier than water,why are ships able to ___________ on the sea?(  )
A.floatB.drownC.shrinkD.split

分析 既然铁比水重,为什么轮船能漂浮在海上?

解答 答案:A
float"漂浮";drown"淹死,淹没";shrink"收缩,畏缩";split"分离,分解".由on the sea可知,float合适.故选A.

点评 动词词义辨析题,分清句意和动词的意思即可.

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