H2C2O4的Ka1=5.9×10-2,Ka2=6.4×10-5,则其0.10mol/L溶液的pH为()。
A. 2.71
B. 1.11
C. 12.89
D. 11.29
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写出目前三层MPLSVPN组网中涉及路由器的逻辑名称及其主要功能。
You work as the enterprise exchange administrator at Xxx .Xxx is using Microsoft Exchange Server 2010 as their messaging solution.The Xxx network has two Mailbox servers named XXX-EX01 and XXX-EX02.During the course of the week you receive an instruction from the CIO to determine the amount of time it takes for the delivery of messages between XXX-EX01 and XXX-EX02.Which of the following commands can be used to achieve this goal?()
A. You must use the Test-ServiceHealth cmdlet.
B. You must use the Test-Mailflow cmdlet.
C. You must use the Get-MailboxStatistics.
D. You must use the Get-MailboxDatabase.
人民群众之所以(),就是因为共产党是为人民服务的
A. 理解
B. 信任
C. 选择
D. 支持