在分析投资方案时，最重要也是最困难的步骤就是估计投资方案的（）。
参考答案：现金流量
2005重庆, 27） __________, he talks a lot about his favorite singers after class.
A．A quiet student as he may be
B．Quiet student as he may be
C．Be a quiet student as he may
D．Quiet as he may be a student
腹部扪及条索状团块
A．麻痹性肠梗阻B．绞窄性肠梗阻C．血运性肠梗阻D．单纯性肠梗阻E．蛔虫性肠梗阻
