赫钦斯认为，教育的一个重要目的就是要引出人性的共同要素，为培养这种（）的人性服务。
当证券持有期收益率（），表示证券投资没有损益。 [" 等于1"," 等于0"," 小于0"," 大于0"]
Which three statements about L2TPv3 are true？（） ["L2TPv3 Frame Relay support includes only 32-bit DLCI addressing","L2TPv3 sessions do not support Frame Relay LMI interworking","Multipoint DLCI is not supported","To use DCE or a Network-to-Network Interface on a Frame Relay port， you must configure the frame-relay switching command","L2TPv3 feature does not support Frame Relay extended addressing"]
列车乘务服务用语的总体要求是：使用普通话，运用（）、表达得体、通俗、清晰、规范。 ["问候用语","尊敬用语","称呼用语","文明用语"]
1850 TSS支持的同步方式包（） ["TDM timing","Synchronous Etherne","IEEE 1588 V2"]
网络安全涉及到TCP/IP哪几层？
