建立、健全防汛组织机构,强化防汛工作责任制,明确()和()。
参考答案:防汛目标;防汛重点
Either Sam or Tom __________ an exam at the moment.
A. are having B. is having C. were having
RL一阶电路的零输入响应,uL按指数规律衰减,iL按指数规律衰减。