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【单选题】
Your company has a single active directory domain named contoso.com. all servers run windows server 2008. You have a public DNS server named server1, and an e-mail server named server2. Client computers outside the company domain are unable to send e-mail messages to contoso.com. you verify that the host (A) DNS record for server2 is available to external client computers. You need to ensure server2 can receive e-mail messages from external client computers. How should you configure the contoso.com DNS zone?（）A.
Add a mail exchange (MX) record for server2.
B.
Add a mailbox (MB) record for server2. Set the mailbox host setting to server2.
C.
Add a canonical (CNAME) record that maps server2 to contoso.com.
D.
Add a server locator (SRV) record for server2. Set the service field to _smtp. Set the protocol field to _tcp. Set the port number to 25.
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【简答题】什么是状态转移图?
【简答题】3只猫3天吃3只老鼠，照这样的速度，9只猫9天吃______只老鼠．
【简答题】3只猫3天吃了3只老鼠，照这样的效率，12只猫12天能吃______只．
【简答题】2只猫2天抓了2只老鼠，那么在10天里抓10只老鼠，需要______只猫．
【判断题】状态转移图中,需要进行状态转移时,可以使用置位指令SET和输出指令OUT,但是两者是有区别的。SET指令用于向下一个状态转移,OUT指令用于向分离状态转移
A.
正确
B.
错误
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