利用五感点检方法，判断运转设备的（）、振动、声音、松动、腐蚀、泄漏等。

— What has fur?  — __________. [ ]

A. Cat    

B. Fish    

C. Elephant

TCP表示的是（）。

A.超文本传输协议

B.传输控制协议

C.网络安全协议

D.远程登录协议

E.文件传输协议

如果AT会以很高的功率发射接入探测，造成了不必要的干扰，通过调整以下哪个参数可以降低干扰（）

A.DRCChannelGain

B.OpenLoopPowerAdjustment

C.ProbeNumStep

D.AccessCycleDuration

地沟油是指在生活中存在的各类劣质油．由于地沟油中含有杂质及有毒物质，很多人猜想它的密度应该比正常食用油的密度要大，为了验证这种猜想，某同学找到质量为0.46千克的地沟油，测出其体积为0.5升．试计算该地沟油的密度ρ；能否用密度这一指标来鉴别地沟油？并说明理由．[已知正常食用油的密度约为（0.91～0.93）×10³千克/米³．

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. There are two types of key technology: private key and public key. Private-key encryption methods are called (71) ciphers, information is encrypted with (72) both the sender and receiver hold privately. Public-key encryption methods are called (73) ciphers, (74) created for each user, encryption key and deception key are (75)

A．synchronous

B．Asynchronous

C．symmetric

D．asymmetric