什么是解除警报？
参考答案：敌人一次袭击过后或敌空袭危险消失时发出的信号。
祛瘀消肿膏功效与作用
The tools and techniques of quantitative risk analysis are______．
A．contracting，contingency planning，alternative strategies，and insurance
B．interviewing，historical results，workarounds，and additional response development
C．checklists，damage control reports，standard allowances, and inspection
D．data gathering and representation techniques，and quantitative risk analysis and modeling techniques
