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3.Some blood types are quite common,others are regionally        ,and still others are rare everywhere.(  )
A.distributedB.contributedC.obtainedD.convinced

分析 一些血型很常见,而有一些呈地区分布,但仍有少量血型很罕见.

解答 答案是A.本题考查动词词义辨析.distribute分布;分配;contribute;贡献;有助于;obtain得到;获得;convince使信服;确信.根据句意可知A项正确.故选A.

点评 本题考查动词词义辨析,考生在平时的学习中应注意积累相应的词汇和搭配,并牢记其意思.在做题时,将词义和题干相结合,从语法、句子结构尤其是句意上去判断,句意通顺,符合逻辑,即正确答案.

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