题目内容
（请给出正确答案）
A、EPS attach
B、combined EPS/IMSI attach
C、EPS emergency attach
D、其它
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更多“支持CSFB终端在LTE附着时，attach request…”相关的问题
B.NSA/SA双模终端：UE从NSA区域移动到SA覆盖区，当测量到NR小区后，则NSA状态下的ENB收到测量报告后向EPC发出切换请求，然后EPC将切换请求信息发送给5GC
C.NSA单模终端：UE漫游到SA区域无法支持5G，仅支持4G
D.SA/NSA双模终端可从SA切换到NSA，UE从SA覆盖区移动到NSA区域，则触发异系统切换LTE，如果L-NR的邻区存在，则增加5G辅载波，转为NSA模式
Which of the following statements is NOT mentioned in the passage？
A. Malaria is under attack in a number of countries.
B. Some types of mosquitoes have become resistant to the current sprays.
C. New poisons have been put into wide use with the new science.
D. One of human's challenges is to win the campaigns against mosquitoes.
