14．This scientific experiment requires a great deal of _____．（　　）
A．cencentrationB．concentrateC．concentraionD．concentration

分析 科學(xué)實驗需要非常地專心．

解答 答案是D．本題考查單詞拼寫．A和C項拼寫錯誤；B項為動詞，表示"專心于； 集中"；C項是名詞，表示"專心，集中"；根據(jù)句子結(jié)構(gòu)，題干中需要的是名詞"專心"，所以答案選擇D項．

點評 本題考查名詞詞義辨析，考生在平時的學(xué)習(xí)中應(yīng)注意積累相應(yīng)的詞匯和搭配，并牢記其意思．在做題時，將詞義和題干相結(jié)合，從語法、句子結(jié)構(gòu)尤其是句意上去判斷，句意通順，符合邏輯，即正確答案．

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