在项目投资决策的现金流量分析中使用的"经营成本"是指（）。
人民法院的执行根据必须具有（）。 ["确认内容","给付内容","变更内容","形成内容"]
下列说法只有（）是正确的。 ["“象”是比画是十一笔","“及”是一个合体字","部首的范围比偏旁大","现代汉字形声字声旁音准确"]
Which statement is true about the comparison of voice traffic with video traffic？（） [" Video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows."," Latency requirements are less stringent for video traffic than for voice traffic."," Video traffic is less sensitive to dropped packets than for voice traffic."," Video traffic requires the retransmission capabilities of TCP whereas voice uses UDP."," Voice traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows."," Voice traffic requires the retransmission capabilities of TCP whereas video uses UDP."]
8种必须的aa有哪些？
简述典型流感的主要临床特点有哪些？
