Using fiber optic cable, optical communications have enabled telecommunication （93） to be made over much greater distances and （94）much lower levels of（95）in the transmission medium and possibly most important of all, optical fiber communications have enabled much higher data rates to be accommodated

A． links B. lines C. circuits D. devices A. through B. from C. at D. with A. dispersion B. loss C. noise D. data rate

[名词解释] Optical fiber光纤

China has signed cooperation agreements with some countries on fiber optic cable

[名词解释] 视盘（optic disc）

[单选题]A local area network(LAN)is the communication of a number of computers by (66) connecting to each one in a single location,usually a single floor of a building or all the computers in a small company.(66) A．lineB．cableC．copperD．copper cash

[单选题]A．s a result of these advantages, optical fiber communication systems are widely employed for applications （96）major telecommunications backbone （97） to Ethernet systems, broadband distribution, and general data networking.A． including 包含 B. ranging

[单选题]Fiber to the office是指（）。A .光纤到楼B .光纤到办公室C .光纤到户D .光纤到小区

[名词解释] 英译中：Optical scanner

[单选题]C．able表示()。A．电缆B．绳子C．车D．进位

[名词解释] 蒲肯野纤维（Purkinje fiber）

[单选题]In this passage, "optical" can be understood as related to ______.A．lightB．audioC．electronicsD．multimedia