森林草原火灾和重大生物灾害属于（）
A.自然灾害
B.事故灾难
C.公共卫生事件
D.社会安全事件
参考答案：A
77. --- What is the weather like these days?
--- It has been warm for ______ few days.
A．past
B．passing
C．the past
D．Pass
支气管扩张患者，经常咳绿色脓性痰，对该致病菌无效的药物是
A．阿奇霉素B．哌拉西林C．头孢他啶D．环丙沙星E．亚安培南
