题型:问答题 简答题 选出与问句相匹配的答句。( ) 1. Can you play cards? ( ) 2. Can a fish swim? ( ) 3. What has wings? ( ) 4. Does a pig have wings? ( ) 5. What colour is the rabbit? ( ) 6. Is the mouse big? A. A duck has wings. B. No, it isn't. C. Yes, I can. D. It's white. E. Yes, it can. F. No, it doesn't. 查看答案
题型:问答题 简答题 下列关于免疫放射分析的说法错误的是()。A.放射性核素标记抗体,不会改变抗原的免疫活性B.结合部分放射性的抗体与待测抗原浓度呈正相关,但存在"平台效应"C.抗原全量参与反应,反应迅速,灵敏度高,标准曲线工作范围大D.免疫放射分析仅适用于多肽和蛋白质大分子物质的测定E.抗体是小分子蛋白,含有酪氨酸较少,因而比抗原易于标记 查看答案