问答题

申请携号转网的号码入网时间为

答案： A.入网是指号码在BOSS系统上入网时间已满120日
B.入网是指距离最近一次号码携转已满120日(正确答案)

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不定项选择

DRAM中存储的数据如果不进行周期性的刷新，其数据将会丢失；而SRAM中存储的数据无需刷新，只要电源不断电就可以永久保存。

A．正确
B．错误

单项选择题

During the feudal society, Kungfu　greatly and improved a lot according to the needs of the society. A.
had developed B.
had been developed C.
have developed D.
have been developed