G.655光纤又称为真波光纤,它同时克服了G.652光纤色散受限和G.653光纤不宜支持WDM系统的缺点,既能应用于TDM10Gbit/s、及以上系统方式,又能应用于WDM系统方式。
查看答案
Syslog was configured with a level 3 trap. Which 3 types of logs would be generated?()
A. Emergencies
B. Alerts
Critical
D. Errors
E. Warning
If a vessel takes a sudden,severe list or trim from an unknown cause,you should FIRST().
A. determine the cause before taking countermeasures
B. assume the shift is due to off-center loading
C. counterflood
D. assume the cause is environmental force
下列对连续X射线的强度与靶材的原子序数关系的叙述哪种是正确的?()
A. 强度与原子序数成正比
B. 强度与原子序数不成正比
C. 强度与原子序数成反比
D. 强度与原子序数的平方成正比
带轮工作表面的光洁度要适当,过高易打滑、过低则带与轮工作面()。
A. 产生跳动
B. 产生震动
C. 加剧磨损
D. 易老化