第14题: [单项选择]下列哪种成分几乎不被重吸收而随尿排出体外()。 A. 肌酸 B. 尿肌酐 C. 氨基酸 D. 乳酸 E. 葡萄糖 参考答案:B 答案解析:本题考查要点是“尿肌酐”。尿肌酐是体内肌酸代谢的最终产物,是脱水缩合物。由于肌酸经非酶促反应脱水,生成的绝大部分肌酐由肾小球滤出,肾小管不重吸收,排泄至尿液中,所以人体每日的肌酐排出量较为恒定。因此,
第32题: [单项选择]Sometimes the bank manager himself is asked to ______ checks ff his clerks are not sure about them. A. credit B. assure C. certify D. access 参考答案:C 答案解析:certify作“证明,保证”讲,例如:She succeeded in certifying that she was the real daughter of the king.她成功地确定了自己