最彻底的应急响应是()。
A.医疗与卫生
B.警戒与治安
C.指挥与控制
D.人群疏散
参考答案:D
The plane in Shanghai at 10 o'clock in the morning. [ ]
A. arrives
B. gets to
C. reaches
D. arriving
市场细分从实质上看是对()的界定。