用两只股票的收益序列和市场平均收益序列数据，得到如下两个回归方程：第一只：r=0.021+1.4rm第二只：r=0.024+0.9rm并且有E（rm）=0.018，β2δ2m=0.0016。第一只股票的收益序列方差为0.0041，第二只股票的收益序列方差为0.0036。试分析这两只股票的收益和风险状况。
简述效果图表现类型。
分接后的某一次群判定第161位有Vi插入时，三位插入标志码应为（） ["100","000","001","111或110"]
生物降解
Which two statements are true about the various methods of implementing QoS？（） ["Cisco AutoQoS can be used repeatedly to apply a single QoS policy to multiple interfaces.","Cisco AutoQoS includes an optional web-based GUI for automating the configuration of QoS services.","Cisco AutoQoS provides capabilities to automate VoIP deployments.","The auto qos global configuration command is used to configure Cisco AutoQoS.","The Modular QoS CLI （MQC） is the best way to fine tune QoS configurations.","The SDM QoS wizard is the fastest way to implement QoS."]
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