单旋回法适用于人落水后：（）
A.立即行动
B.延迟行动
C.人员失踪
D.延迟行动，人员失踪
参考答案：A
结合生命周期法和 【14】 的思想构成了现在大部分信息系统开发方法的理论基础，如结构化生命周期方法。
She told me _____in America. She said she had a good time there. [ ]
A. what she sees
B. what she saw
C. what does she see
D. what did she see
