第6题: [单项选择]老年人感染时,用药的原则是 A. 使用糖皮质激素抗感染 B. 大剂量有杀菌作用的抗生素 C. 选用杀菌作用强的药物,尽量避免用氨基糖苷抗生素。 D. 选作用温和的抗生素,加大剂量使用 E. 选用抑菌药物,缩短用药时间 参考答案:C 答案解析:氨基糖苷抗生素具有严重的耳毒性和肾毒性,应尽量避免应用,杀菌药物都具有一定程度的耐药性,选择作用强的不但可以增强药效还能缩短用药时间,从而减慢耐药程度。
第29题: [单项选择]passage two Questions 30 to 32 are based on the passage you have just heard. A. By studying the signs around them with eyes and brains. B. By changing the weather. C. By controlling the weather. D. By listening to others’ advice. 参考答案:A 答案解析:[听力原文] How do people make weather forecasting