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系统安全评价的意义是什么？

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说出判断肥胖的标准、肥胖的要害、发生的原因、选择减肥食品的“原则” 和减肥的秘诀。为什么减肥者不能限制吃五谷杂粮？

You have a main office and five branch offices. The offices connect to each other by using a WAN link. An Active Directory site exists for each office. Each site has a separate IP site link to all other sites. The main office site is configured as a hub site. You have an Exchange Server 2010 organization. You discover that messages sent between offices are not routed through the Hub Transport servers in themain office. You need to ensure that all messages sent between offices are routed through the Hub Transport serversn the main office. What should you do？（）

A. Change all IP site links to SMTP site links.
B. Modify the Exchange-specific cost for each site link.
C. From the Hub Transport servers in each site，create a journal rule.
D. From the Hub Transport servers in each site，create a transport rule.

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激励的合理性原则包括了适度和公平两个要求。（）

A. 正确
B. 错误

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在液相色谱中为了改善分离的选择性下列措施（）是无效的。

A. 改变流动相种类
B. 改变固定相类型
C. 增加流速
D. 改变填料的粒度

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