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【多选题】
GSM与GPRS特点有哪些不同?A.
GSM 网络的特点是适合承载语音业务；而GPRS的特点是适合承载数据通信业务。
B.
GPRS核心是分组交换技术，而GSM核心是电路交换技术；
C.
GPRS 可以按照流量计费，而GSM传输数据能按照时间收费
D.
GPRS终端可以长时间保持与网络的连接，实现“时时在线”，而GSM无法实现；
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A.
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B.
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C.
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D.
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B.
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C.
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