Fast IP技术

The objective of fast tracking a project is to ______ 。

A:increase productivity B:reduce project duration C:increase schedule tracking controls D:reduce project risks

At the end of the night the girls were fast ______.

A:asleep B:sleeping C:sleep D:slept

Catalyst 6500(Catalyst OS(CatOS)系统)中配置Uplink Fast生成树可选功能的命令格式是( )。

A:set spantree uplink fast enable B:spanning-tree uplink fast C:spanning-tree vlan root primary D:spanning-tree uplink fast max-update-rate <0-32000>

中国的FAST（500米口径球面射电望远镜）主体的落成为何引起海内外的热烈关注?原因有三。一是看得远。作为目前口径最大的射电望远镜，FAST在理论上可以接收到137亿光年以外的电磁信号。二是很灵活。FAST的索网结构可以随着天体移动变化，极大提升观测效率。三是高精度。FAST射电望远镜的结构，处处都是毫米级精度要求；用来编织索网手臂般粗细的钢缆，加工精度都被控制在1毫米以内；最终的天线精度是3毫米，小面板的制造精度是1.5毫米。这一切意味着我们将能倾听来自宇宙更深处的声音，观测宇宙更隐蔽的奥秘。 这段文字最适合的标题（    ）。

A:海内外热烈关注中国的FAST B:走进中国的FAST 走进宇宙深处 C:中国的FAST有三大过人之处 D:一起倾听来自宇宙深处的声音

中国的FAST（500米口径球面射电望远镜）主体的落成为何引起海内外的热烈关注?原因有三。一是看得远。作为目前口径最大的射电望远镜，FAST在理论上可以接收到137亿光年以外的电磁信号。二是很灵活。FAST的索网结构可以随着天体移动变化，极大提升观测效率。三是高精度。FAST射电望远镜的结构，处处都是毫米级精度要求；用来编织索网手臂般粗细的钢缆，加工精度都被控制在1毫米以内；最终的天线精度是3毫米，小面板的制造精度是1.5毫米。这一切意味着我们将能倾听来自宇宙更深处的声音，观测宇宙更隐蔽的奥秘。 这段文字最适合的标题（    ）。

A:海内外热烈关注中国的FAST B:走进中国的FAST 走进宇宙深处 C:中国的FAST有三大过人之处 D:一起倾听来自宇宙深处的声音

[ With the 4G telecommunications systems now starting to be deployed, people are looking towards the development of 5th generation or 5G technology services. Although the deployment of any wireless or cellular system take many years, development of the 5G technology systems is being investigated. The new 5G technologies will need to be chosen developed and perfected to enable timely and reliable deployment. The new 5th generation,5G technology for cellular systems will probably start to come to fruition around 2020. The current status of the 5G technology for cellular systems is very much in the early development stages. Many companies are looking into the technologies that could be used to become part of the system. In addition to this, a numberof universities have set up 5G research units focused on developing the technologies for 5G. In addition, the standards bodies, particularly 3GPP are aware of the development but are not actively planing the 5G systems yet. Many of the technologies to be used for 5G will start to appear in the systems used for 4G and then as the new 5G cellular system starts to formulate in a more concrete manner, they will be incorporated into the new 5G cellular system. The major issue with 5G technology is that there is such an enormously wide variation in the requirements：super fast downloads to small data requirements for IoT than any one system will not be able to meet these needs. Accordingly a layer approach is likely to be adopted. As one commentator stated：5G is not just a mobile technology. It is ubiquitous access to high & low data rate services.]

the major issue facing with 5G technology is( ).

A:super fast downloads B:small data requirements for IoT C:4G system has already satisfied these needs D:an enormously wide variation in the requirements