A.星型(star)
- A星型(star)
- B环型(ring)
- C树型(tree)
- D总线型(bus)
A.星型(star)
解析:IEEE和ISO先后进行了LAN的标准化工作,涉及到四类不同信道访问控制方法和拓扑构形的网络,如表2-1所示。时隙方法的环型网来源于剑桥环(CambridgeRing),只在ISO8802标准,而不在IEEEE802标准中。
1、A double star is a star that().
A double star is a star that().Ahas a declination equal to twice that of the SunBcomprises two stars that appear close togetherCis twice as bright as a single starDsuddenly becomes much brighter and then fade
2、The firing of a red star signal may me
The firing of a red star signal may mean().AThis is the best place to landBYou are seen - assistance will be given as soon as possibleCTail block is made fastDSlack away
3、A large group of stars revolving aroun
A large group of stars revolving around a center is known as a().AclusterBshowerCconstellationDgalaxy
4、The girl is()of a film star.
The girl is()of a film star.AsomebodyBsomethingCanybodyDanything
5、The girl is()of a film star.
The girl is()of a film star.AsomebodyBsomethingCanybodyDanyone
6、A star is observed at lower transit. T
A star is observed at lower transit. The line of position derived from this sight is().Aon the prime verticalBa latitude lineCa longitude lineDof no special significance