实践对于实施素质教育具有什么重要的意义？
在建立管理信息系统中，人才问题反映为哪两个队伍的建设？
Which two QoS classification and marking statements are true？ （） [" In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit."," In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field."," In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values."," The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet."," The 802.1Q standard uses a three bit field referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS."]
关于HBV-DNA的描述哪项是正确的（） ["HBV-DNA是单链环状DNA","HBV-DNA是双链线状DNA","游离型HBV-DNA是指血清中除HBV颗粒以外形式存在的游离HBV-DNA","整合到肝细胞基因组中的HBV-DNA称整合型HBV-DNA","和HBsAg一样，HBV-DNA阳性只代表有HBV感染，与病毒的复制无关"]
1957年，经济学家顾准提出，“在社会主义，社会货币、商品不能废除，价值范畴、价值规律应继续存在并发挥作用。因此，为了提高效率，应以市场价格的自由涨落，即真正的市场规律来自发调节生产。”该观点体现出当时中国（）。 ["已经引发对市场经济理论的初探","“左”倾错误弥漫阻滞探索进程","计划经济理论尚未付诸实践","三大改造明确经济整改方向"]
太阳的体积是地球的130万倍。外部太阳大气的底层称为（）。
