第9题: [单项选择]银量法测定苯巴比妥含量的原理是 A. 苯巴比妥与Ag+发生沉淀反应 B. 苯巴比妥与Ag+生成盐 C. 苯巴比妥分子的丙二酰脲结构可与Ag+反应,生成可溶性的一银盐 D. 苯巴比妥分子的丙二酰脲结构可与Ag+反应,生成不溶性的二银盐 E. 苯巴比妥分子与Ag+形成可溶性的配位化合物 参考答案:C
A. They are the smallest marine animals. B. They are pink in color. C. They are similar in size to lobsters. D. They have grass like bodies. 参考答案:B 答案解析:[解析] 事实细节题。根据倒数第二段对“krill”的描述,作者只提到它显眼的粉红色(Because of their pink color,they often appear,as a solid