题目内容

苯环上的一个氢被烷基取代。其毒性发生改变( )。

A. 苯主要从呼吸道排泄,对呼吸系统有毒性作用,甲苯没有
B. 苯对造血功能主要是抑制作用,而甲苯为麻醉作用
C. 甲苯在肝脏中氧化,对有损害作用,而甲苯没有
D. 苯中毒产生过量的儿茶酚胺刺激心肌细胞发生心颤动,而甲苯没有
E. 苯为致癌物,甲苯为工业毒物

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But all this part of it seemed remote and unessential. I[Nick]found myself on Gatsby"s side, and alone. From the moment I telephoned news of the catastrophe to West Egg Village, every surmise about him, and every practical question, was referred to me. What is the theme of the work

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