第24题: [单项选择]头孢唑啉: A. 对革兰阴性杆菌作用很弱 B. 对β-内酰胺酶较稳定 C. 二者皆有 D. 二者皆无 参考答案:C
第25题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. A guest and a receptionist. B. A passenger and an air hostess. C. A customer and a shop assistant. D. A guest and a waitress. 参考答案:B 答案解析: [听力原文] M: Sorry to trouble you. But is there any possibility of
borrowing a blanket. I