题目内容

通常一个网络管理系统在逻辑上由()、()和()三部分组成。
A管理者
B被管对象
C管理进程
D管理协议

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带宽为4KHz并用8种电压对数据编码传输，最大数据率可以是()Kbps。
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B24
C16
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Some social scientists have claimed that divorce harms children for the rest of their lives leading them to form. marriages as happy as their parents. But other recent studies say marital【M1】 breakups have mixed long-term effects, foster growth in some【M2】 children and the resolve to build happier marriages of their own. In support of the second viewpoint, a recent Pew Research Center study suggests that when divorced parents remarry, the【M3】 kids own marriages may benefit from the example of a parents second, happier union. Indeed, some 60% of children who grow up in stepfamilies say their marriages are closer than that of their own【M4】 biological parents, says the Pew survey of 2,691 adults, conduct【M5】 last October. Also, some 70% of people with step-relatives say they are very satisfied with their family lives, the Pew study shows. The study indicates that the stepkids may be benefiting【M6】 from a parents positive bond with a stepparent. Still, blood is thicker than water. The 42% of Americans who have at least one step-relative typically feel a strong sense of【M7】 obligation to their biological parent, child or sibling than their【M8】 step-relatives, the Pew survey says. Significantly higher percentages of correspondents said they would feel obligated to【M9】 provide financial help or care with a biological relative who was in【M10】 trouble, compared with those who would help a step-relative who was in trouble.
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