第5题: [单项选择]血中胆碱酯酶活性可用来评价某种毒物的接触程度。这里的“某种毒物”指的是()。 A. 苯乙烯 B. 苯 C. 二甲苯 D. 甲苯 E. 有机磷农药 参考答案:E 答案解析:有机磷农药中毒的机制,一般认为是抑制了胆碱酯酶的活性,造成组织中乙酰胆碱的积聚,其结果引起胆碱能受体活性紊乱,而使有胆碱能受体的器官功能发生障碍。胆碱酯酶(ChE)是由肝脏合成的一种非特异性酯酶,常用
第35题: [单项选择]What do we learn about prisoners in Britain A. They are encouraged to do maintenance for the training centre. B. Most of them get paid for their work. C. They have to cook their own meals. D. They can choose to do community work. 参考答案:B