第6题: [单项选择]磷酸戊糖途径是在哪个器官或组织中进行的(). A. 胞浆 B. 肝脏 C. 乳腺 D. 线粒体 E. 肾脏 参考答案:A 答案解析:糖的有氧氧化可分为两个阶段,第一阶段是胞浆反应阶段,第二阶段是线粒体中的反应阶段;肝脏是糖异生的主要器官,在长期饥饿、酸中毒时肾脏的糖异生作用加强;磷酸戊糖途径在胞浆中进行,存在于肝脏、乳腺和红细胞等
第9题: [单项选择]A. Pay for some of the picnic food. B. Insist on choosing their own food. C. Treat Debbie to dinner some other time. D. Thank Debbie for her generous offer. 参考答案:A 答案解析:[解析] M: You know the picnic we are having next Saturday evening Debbie insists on buying the fo
A. life expectancy has been going up steadily B. there is a decline of the young population C. in America the birth rate has gone above replacement level D. the old population has risen sharply in USA 参考答案:B 答案解析:细节题。文章第3段谈到世界人口变化的新趋势:青年人数的减少(But the decline in the number of young people is something new)。故选B。