Petrography concerns primarily with the detailed description and calssification of rocks ,whereas petrology deals primarily with rock formation.
真题参考答案是A,理由是 :人物才是concern的主体,petrography只是被concern的对象。
疑惑中......
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be concerned with 与.....有关
可以这样分析,concern做不及物动词的时候,是至关重要的意思,其余情况均作及物动词讲,这里从句义上看应该是跟...有关或者涉及的意思,那么肯定是及物动词。可是后面又跟with,这说明只能用被动语态,否则他就是不及物动词了。
可以这样理解:
一下摘自longman
concern [transitive][not in passive] if a story, book, report etc concerns someone or something, it is about themThis study concerns couples' expectations of marriage. The report concerns the drug traffic on the Mexican-US border.
可见concern 主动表示关于的时候, 是接物动词, 不用with,
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