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孔庙大成殿内“万世师表”匾,为何人所题?意思是什么?

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星形拓扑结构的优点是

实验控制的方法有哪些?

You have an Exchange Server 2010 server that has the Mailbox, Hub Transport, and Client Access server roles installed. You need to ensure that users can send and receive e-mail by using Windows Live Mail or Microsoft Outlook Express. What should you do on the server()?

A. Install and then configure the SMTP server feature.
B. Start the Microsoft Exchange POP3 service and then set the startup type to Automatic.
C. Modify the properties of the MSExchangePOP3 (TCP-in) Windows Firewall rule.
D. Modify the properties of the MSExchangeMailSubmission - RPC (TCP-in) Windows Firewall rule.

为保证行车安全,混凝土表面应具有粗糙抗滑的表面。最普通的做法是用棕刷顺横向在抹平后的表面上轻轻刷毛;也可用金属丝梳子梳成深l~2mm的横槽。还有用锯槽机将路面锯割成深5~6mm、宽2~3mm、间距20mm的小横槽。也可在未结硬的混凝土表面塑压成槽,或压人坚硬的石屑来防滑。

A. 正确
B. 错误

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