【简答题】当某个路由器发现一IP数据报的检验和有差错时,为什么采取丢弃的办法而不是要求源站重传此数据报?计算首部检验和为什么不采用CRC检验码?
【单选题】关于工程设计资质活动中,只设甲级的是( )。
【单选题】When constructing charts, the following is plotted at the class midpoints:
C.
cumulative percentage polygon (ogives).
【简答题】. 当某个路由器发现一 IP 数据报的检验和有差错时,为什么采取丢弃的办法而不是要求源站重传此数据报?
【单选题】When constructing charts, the following is plotted at the class midpoints:
C.
cumulative relative frequency ogives.
【多选题】以下勘察设计资质中,只设甲级的是( )。
【单选题】A true bearing of a charted object, when plotted on a chart, will establish a ______.
【单选题】A true bearing of a charted object,when plotted on a chart,will establish a ______.
【单选题】When a moving average is plotted onto a graph, where should the plotted points be located?
A.
At the end of period to which they apply
B.
At the beginning of period to which they apply
C.
At the mid-point of period to which they apply