第4题: [单项选择]Passage Three Questions 32 to 35 are based on the passage you have just heard. A. Almost one million. B. About 600 thousand. C. Nearly 400 thousand. ’ D. Approximately 200 thousand. 参考答案:B 答案解析:[听力原文]32-35 Good evening. I know many of you students are the proud owners of your first moto
第12题: [单项选择]目前AST测定方法中最常用的基质是 A. 丙氨酸-α酮戊二酸 B. 天冬氨酸-α酮戊二酸 C. 丙酮酸-谷氨酸 D. 草酰乙酸-谷氨酸 E. 谷胱甘肽-氨基酸 参考答案:B 答案解析: 本题考查AST的测定方法,连续监测法测定血清AST活性浓度采用天冬氨酸和a-酮戊二酸在AST作用下,生成草酰乙酸和L-谷氨酸。