9．They decided to start an immediate _________ into the cause of the pollution of the lake．（　�。�
A．appreciationB．investigationC．operationD．adaptation

分析 他們決定立即開始對(duì)引起這個(gè)湖污染根源的調(diào)查．

解答 答案B．
A項(xiàng)"感激，欣賞"；C項(xiàng)"手術(shù)，操作"；D項(xiàng)"適應(yīng)，改編"；B項(xiàng)"調(diào)查"；根據(jù)句意"他們決定立即開始對(duì)引起這個(gè)湖污染根源的調(diào)查"可知，B項(xiàng)符合語境，故選B．

點(diǎn)評(píng) 本題考查名詞辨析．解答此類題目首先要讀懂句意，理解每個(gè)選項(xiàng)名詞的意思，然后根據(jù)上下文語境鎖定合適的名詞．平時(shí)要加強(qiáng)名詞詞匯量的積累．

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