网络管理基本模型是由网络管理者、网管代理、管理信息库等要素构成，下列选项属于网络管理者的操作是______。
A．发送Trap消息
B．发送Get/Set命令
C．接收Get/Set操作
D．维护MIB
参考答案：B
解析： 在网管体系中，被管设备上的进程是网管代理，它用以维护MIB信息、接收管理进程发过来的Set/Get消息，以及发送Trap消息给管理进程。而作为网络管理者(网管工作站)要作的操作则是接受Trap消息以及发送Set/Get包。
(2013·高考重庆卷，B)It is easy to overlook the role that your body plays in influencing your mood(情绪)．When you are____，you may find yourself blaming work pressures or an unknown future.However，it could just be that you’ve been sitting behind your desk too long. One way to improve your mood is____.Psychologically，it provides you with a break from the stresses in your life.Also，in the process，you may aim for____goals，like a new personal running record or a better body shape.The achievement of a particular goal makes you feel good and contributes to your____.That is why exercise has been shown to____your selfrespect. You do not have to train yourself____to feel the psychological benefits of exercise.What really matters is____，not intensity(强度)of your exercise.You can try walking for 30 minutes five times per week or simply gardening on weekends.
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