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插入单板的正确方法是什么？

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风枪三连件是指（）；（）；（）。

You have an Exchange Server 2010 organization. All users on the network connect to their mailboxes by using Microsoft Office Outlook. Your companys compliance policy states that： .A copy of e-mail messages sent to the human resources department from the Internet must be archived .All archived e-mail messages must be stored on a third-party archival server You need to recommend a solution that meets the requirements of the compliance policy. What should you include in the solution？（）

A. journal rules
B. personal archives
C. Retention Policies
D. Transport Protection Rule

下列哪项不是装卸搬运的特点（）

A. 装卸搬运是附属性的活动
B. 装卸搬运是保障性的活动
C. 装卸搬运是衔接性的活动
D. 装卸搬运是可有可无的活动

摩擦性失业并不是竞争性劳动力市场的自然特征。

A. 正确
B. 错误