FTTB和FTTH的区别FTTB的全称是Fiber To The Building，意思是“光纤到楼”。FTTB采用的是专线接入，无需拨号。它采用光纤直接通到大楼，再用双绞线接到用户的方式，属于专线接入，用户无须拨号上网，开机即可进入互联网。FTTB使用的接入设备是内置式以太网卡，每个用户均可独享双向10M带宽 FTTH就是光纤进入每家每户，提供的带宽是ADSL的100倍。光纤具有寿命长，无干扰,
Unit5-课文Unit 5Text There is one gas prent in the air we breathe that is esntial to life. Unfortunately, one can have too much of a good thing and the growth in carbon dioxide threatens to warm up
S318Special Abstracts/Journal of Biotechnology150S(2010)S1–S576[P-F.58]Enzymatic Conversion of Phosphatidylcholine from Milt of Yel-lowtail Seriola quinqueradiata into PhosphatidylrineMasahiro Hayas
弱电工程常用的专业术语微信安全支付AU:Administration Unit 管理单元 AUG:Administration Unit Group 管理单元组 BAC:Building Automation & Control net建筑物自动化和控制网络 二十八天B-ISDN:Brand band ISDN 宽带综合业务数字网 BMS:Build
弱电行业常用的专业术语AU:Administration Unit 管理单元AUG:Administration Unit Group 管理单元组BAC:Building Automation & Control net建筑物自动化和控制网络B-ISDN:Brand band ISDN 宽带综合业务数字网BMS:Building Management System 智能建筑管理系统CD:C
