In order to maintain the reach of a typical 100G WAN transport system(~1500km), several system improvements have to be made to recover the lost (93)，including the use of low-loss low-nonlinearity(94)，Raman amplification,and stronger error correction.

A．noise

B．SNR

C．speed

D．error

[单选题]It is difficult to maintain our present rate of increase and in the meantime keep inflation____control..A． underB． beneathC． withinD． below

[单选题]To maintain a telephone conversation over the Internet. The voice packets must arrive at their destination in ()A．a continuous streamB．a burst streamC．a delayed streamD．a burst mode

[单选题]The project manager must maintain an effective communication link with the customer's satisfaction with the progress of the project. The project manager maintains this link through (71).(71)A．periodic project reports, periodic visits to the customer

[单选题]Who has responsi bilities to maintain the ship？（）A . Flag StateB . shipownerC . crewoftheshipD . managecompanyoftheship

[主观题]how do you maintain emergency battery ?

[单选题]（ ） are those made out to consignees with the words“to the order of ×××”or

[单选题]（ ） are those made out to consignees with the words“to the order of ×××”or

[试题]The discussion should reach beyond scientific societies because_______A． scientists have fails to predict the outcomesB． the ties between different areas need strengtheningC． united efforts are necessary for the development of scienceD． people need to

[单选题]The discussion should reach beyond scientific societies because __________.A． scientists have failed to predict the outcomesB． the ties between different areas need strengtheningC． united efforts are necessary for the development of scienceD． people

[单选题]［A］ connection ［B］ reach ［C］ association ［D］ touch