根据下面的文字资料回答 63~67 题
In low-speed network,it is usually adequate to wait for congestion to occur and
then react to it by telling the source of packets to slow down.In high-speed
networks,this approach oftenworks poorly,because in the(1 )between sending the
notification and notification arriving at the source,thousands of
additional(2 )may aITive.In ATM network,a major tool for
preventing(3 )is(4 )control.when a host wants a new virtual(5 ),it must
describe the traffic to be offered and the service expected.
第63题:文中(1 )处正确的答案是()。
A.interval
B.time
C.slot
D.delay
A.应以电子数据报关单向海关申报,由海关审结;待集装箱运至海关监管现场后,再向海关提交纸质报关单证
B.应同时以电子数据报关单和纸质报关单证向海关申报,由海关审结;待集装箱运至海关监管现场后转关
C.应先向海关提交纸质报关单,由海关预审,待集装箱运至海关监管现场后,再以电子数据报关单向海关正式申报
D.由发货人或其代理人选择使用电子数据报关单或纸质报关单向海关申报,待集装箱运至海关监管现场后转关
20呎的集装箱的规格是(),容积为(),可载重()左右。
A.20×8×8呎 31~35立方米 20吨
B.20×8×8呎 31~35立方米 30吨
C.40×8×8D呎 63~68立方米 30吨
D.40×8×8呎 31~35立方米 30吨
图9-2题9.19的IR及1HNMR谱图
续图9-2