某医生观察某新药对预防流感的效果如下： 下列说法最合适的是

A:服药组的发病率低于未服药组，可以认为该药有效 B:由于两组发病率相差不大，不能认为该药预防流感有效 C:由于未设对照组，不能认为该药预防流感有效 D:本资料应作假设检验后再作结论 E:因为有抽样误差存在，不能作出结论

以下不能用来检出G-6-PD缺乏的试验是

A:高渗冷溶血试验 B:高铁血红蛋白还原试验 C:变性珠蛋白小体试验 D:G-6-PD荧光斑点试验 E:红细胞包涵体试验

2G和3G应最大程度的共用资源，下列哪种2G资源是不能共享的（）

A:2G基站配套设施 B:2G基站主设备 C:2G的局房、话路汇接网、信令汇接网 D:以上均可以共享

全球通客户都不能能办理哪种4G套餐？（）

A:4G飞享套餐系列 B:4G上网套餐系列 C:4G商旅套餐系列 D:4G飞信套餐系列

对于（）即使办理4G套餐暂时不能享受套餐中的4G流量。

A:网龄未有10年的客户 B:未有4G网络的城市 C:未能开通业务4G功能的地市 D:使用该号码未有5年以上的客户

4G网络正常的前提下，什么情况下不能4G上网（）

A:本地当月4G免费流量用完 B:超出套餐所包含的4G流量 C:国内当月4G免费流量用完 D:省内当月4G免费流量用完

[ 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

如果未来是低频高频站混合组网，接入环需要 140G，汇聚环需要 421G，请问核心 环带宽需要多少 G？而现网情况又是否足够支撑 5G空口带宽需求呢？

A:632G，不能 B:632G，能 C:600G，不能 D:600G，能