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根據(jù)GPRS07.07規(guī)范,下列哪個通過modem對MS設(shè)置第一個APN為cmnet和動態(tài)地址的命令是正確的?()

A.AT+CGDCONT=1,"IP","cmnet","0.0.0.0",0,0
B.AT+CGDCONT=1,"cmnet","IP","0.0.0.0",0,0
C.AT+CGDCONT=1,"IP","0.0.0.0","cmnet",0,0
D.AT+CGDCONT=1,"IP","cmnet",0,0,"0.0.0.0"

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