18．Doctors have to learn new knowledge in their field constantly so that they can maintain their professional ___________．（　�。�
A．consequencesB．independenceC．competenceD．intelligence

分析 醫(yī)生們必須學(xué)習(xí)他們領(lǐng)域里的新知識(shí)以便保持他們的專業(yè)能力．

解答 答案是C．考查名詞的辨析．A 結(jié)果；B 獨(dú)立；C 能力；D 才智．句意是"醫(yī)生們必須學(xué)習(xí)他們領(lǐng)域里的新知識(shí)以便保持他們的專業(yè)能力．"故選C．

點(diǎn)評(píng) 解答此類問題首先需要理解每個(gè)單詞的基本含義，并注意交叉含義間的區(qū)別，了解其特殊用法及習(xí)慣搭配等特點(diǎn)，然后結(jié)合語境選擇正確答案．

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