In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.
The key to SNMP (76) is its simplicity. It has a small command set that does a good job of collecting information from (77) any network device. In a SNMP environment, (78) of the work is handled by the network management system. Devices that are being managed are not (79) with processing (80) that might affect their performance.

A．popularity

B．function

C．efficiency

D．power

男，7岁，无意发现鼻腔肿物，无明显症状，CT如图所示，最可能诊断为（）

A.鼻淋巴瘤

B.鼻炎

C.鼻炎鼻息肉

D.鼻 * * 状瘤

E.鼻炎及副鼻窦粘膜下囊肿