简述电子认证的作用。
Which CLI command is used to create a W3C log？（） [" make log"," log config"," w3c log config"," advance dproxy config"," mklog file"]
Which service component in the design phase describes developing a detailed， site-specific plan for implementing the new technology system or solution（） ["Implementation Plan Development","Detailed Design Development","Systems Acceptance Test Plan Development","Staging Plan Development"]
磨光滑，锁上螺丝后做立即做（）（不得用走线架上的孔） ["接地","防尘","防脱漆","防锈处理"]
What is the minimum recommended uplink/downlink speed to support a single encrypted IP voice Teleworker call?（） ["256kbps \/ 1024kbps","256kbps \/ 1544kbps","160kbps \/ 768kbps","384kbps \/ 384kbps","128kbps \/ 512k"]
在整流电路的输出端并联一个电容，利用电容的（）特性，可以使脉动电压变得较平稳，这个电容叫（）电容。
