LTE系统主要指标是什么？
参考答案：
1）灵活支持1.25-20MHz可变带宽
2）峰值数据达到上行50Mbit/s，下行100Mbit/s，频谱效率达到3GPPR6的2-4倍
3）提高小区边缘用户的数据传输速率
4）用户面延迟（单向）小于5ms，控制面延迟小于100ms；支持现有3GPP和非3GPP系统的互操作
5）支持增强型多媒体广播和组播业务（MBMS）
6）降低建网成本，实现低成本演进
7）实现合理的终端复杂度，成本和耗电
8）支持增强的IMS和核心网，追求后向兼容，并考虑性能改进和后向兼容之间的平衡
9）取消CS（电路交换）域，CS域业务在PS（分组交换）域实现，如采用VoIP
10）优化低速移动用户性能，同时支持高速移动；以尽可能相似的技术支持成对和非成对频段
11）尽可能支持简单的邻频共存
Read the following text and choose the most suitable heading from the list A--F for each paragraph. There is one extra heading which you do not need. （考生注意答题卡上的题号要与本题填涂时一致，从76题涂卡）
Television has probably been the most powerful medium in shaping the new community. The electronic community gives us our mutual friends, our significant events and our daily chats. The “produced” relationships of television families become our models for intimacy. We know media stars better than we know our neighbors. Most of us can discuss their lives better than we can discuss those of our relatives. We think a man who plays a doctor on TV actually know something about medicine 小题2:_________ TV isolates people in their spare time. People spend more time watching music videos but less time making music with each other. People in small town now watch international cable networks instead of driving to their neighbor’s house for cards. Women watch soaps instead of attending church circles or book clubs. When company comes, the kids are sent to the TV room with videos. 小题3:_________ Parent are not the main influence in the lives of their children. Some of the first voices children hear are from the television, the first street they know is Sesame Street. A child playing Nintendo is learning different lessons than a child playing along a creek or playing dominoes with a grandfather. 小题4:_________ The time devoted to violence on TV in no way reflects its importance in real life. In real life, most of us exercise, work, visit our friends, read, cook and eat and shop. Few of us spend any significant amount of our time solving murders or fleeing psychotic killers. On television there are many more detective and murderers than exist in the real world. A rule of thumb about violence is “If it bleeds, it leads.” Violence captures viewers’ attention. Our programs have become increasing violent. 小题5:_________ Some might say that there is nothing new under the sun. Of course, in a narrow sense, they are correct. There have always been murderers, and stories about violence have been the theme of literature and song. However, things are different now. Children are exposed to hundreds of examples of violence every day. The frequency and intensity of these images is unprecedented in the history of humanity. We have clear records that this exposure makes it more likely that children will be violent and increase their fear levels about potential violence. |