第12题: [单项选择]A:()you()your homework yet B: Yes. I () it a moment ago. A. Did; do; finished B. Have; done; have finished C. Have; done; finished D. will; do; finish 参考答案:C 答案解析:
第14题: [单项选择]不去蛋白的碱性苦味酸两点动力学法测定血肌酐时,应准确地读取反应后吸光度两个时间点是 A. 10S和20S B. 20S和100S C. 20S和80S D. 60S和100S E. 60S和120S 参考答案:C 答案解析:速率法测肌酐时,利用肌酐与苦味酸在20S和80S之间显色,假肌酐中乙酰乙酸在20秒内显色,其他大部分在80秒后显色。