题目内容
（请给出正确答案）
A.引入高清编解码等技术，比2G/3G语音和OTT语音业务更好的用户体验
B.充分利用4G无线技术高频谱利用率、抗衰落性、高带宽、大容量的优点
C.VoLTE可以在任一智能手机上应用，不需要特殊功能支持
D.VoLTE网络接续时间相比2G/3G网络快
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更多“VoLTE即Voice over LTE，是一种IP数据传输…”相关的问题
B.Homogeneous Support of IMS Voice Over PS Sessions
C.Voice domain preference and UE''s usage setting
D.UE EUTRAN Capability
E.Supported Features
A.VoLTE语音单通率
B.丢包率
C.VoLTE始呼接通率(语音/视频)
D.VoLTE语音MOS质差通话率
A.主叫SIP INVITE到180 RINGING
B.主叫SIP INVITE到UPDATE
C.主叫SIP INVITE到183 SESSION PROGRESS
D.主叫SIP INVITE到100 Trying
A.5G
B. VOLTE
C.4G+
D.4G
A.TTI bundling用于增强上下行VoLTE的性能
B.一般为VoLTE业务配置Non-GBR承载
C.半持续调度(SPS)技术可用于降低VoLTE业务在无线侧占用的控制信道资源
D.VoLTE可实现高速语音编码方式，提供高清语音
A.基于业务的SRVCC：当LTE侧设置QCI=1的业务需要执行切换到UMTS或GSM时，可以触发基于业务的SRVCC。
B.基于上行链路质量的SRVCC：当eNodeb检测到上行链路质量较差时，可以将VoLTE用户移动到UMTS或GSM去承载，触发基于上行链路质量的SRVCC。
C.基于距离的SRVCC：当LTE属于多频段组网，F1频段(LTE800)存在越区覆盖时，此时由于邻区规格问题，远点可能无法配置相应的邻区，因此可以触发基于距离的SRVCC，将VoLTE业务切换到UMTS或GSM去。
D.基于覆盖的SRVCC：当UE移动到LTE弱覆盖，并且当前UE存在VoLTE业务时，可以触发基于覆盖的SRVCC。
Two American inventors, Alexander Graham Bell and Elisa Gray, succeeded at almost the same time. The United States Supreme Court finally had to decide which of the two was the first inventor of the telephone. The Court decided 37 Bell’s favor.
Born in Edinburgh, Scotland, Bell grew up in a family that was very interested in teaching people to speak. His grandfather had been an actor who left the theatre to teach elocution(演讲技巧); his father was a teacher 38 deaf-mutes learn how to speak.
However, probably none of the later inventions gave Bell the same feeling of success __39_ he had on the day when he spilled some acid from his batteries. It was after he had worked for months to find ways to send something more than metallic twangs(金属砰弦声)over the wires. Thinking Watson, __40__, was in the next room, Bell called, "Mr. Watson, come here. I want you." Watson was not in the next room. He was down in his laboratory, next to the receiver. To Watson's surprise, he heard the words perfectly. He ran to tell Bell the news: the wires had carried Bell's voice perfectly.
36. A. had never traveled B. never had traveled
C. was never traveled D. never was traveled
37. A. at B. on C. to D. in
38. A. which was helped B. that was helped
C. who helped D. who has helped
39. A. like B. to C. which D. as
40. A. being his helper B. was his helper
C. his helper D. to be his helper
为保障5G语音业务连续性，说法正确的是（）。
A.如果选用SA模式建网，需要5G网络连续语音覆盖，或者4G网络VoLTE连续覆盖，作为5G语音覆盖的打底网络
B.如果选用Option3系建网，利用4G网络语音流程来保障业务连续性
C.如果选用Option7系建网，则需要通过跨系统切换先切换到LTE网络，然后通过4G语音流程来保障连续性
D.5GVoNR没有覆盖区域可以回落2G/3G来保证语音连续性流程
