下 * * G业务中,不属于2G迁移业务的是()
A.炫铃
B.IVR
C.短信
D.无线上网卡
参考答案:D
The paper fish is really beautiful! Can you show us ______ you make it?
A.how
B.who
C.whether
D.what
按图装置持续通入气体X,并在管口P处点燃,实验结果使澄清石灰水变浑浊,则X、Y可能是( )①H2和NaHCO3 ②CO和Na2CO3 ③CO和CuO ④H2和Fe2O3.
A.①④
B.①③
C.②③
D.③④