Walter Adamson isA.a mobile phone gambler.B.an Internet and mobile services consultant.C.a

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Walter Adamson is

A.a mobile phone gambler.

B.an Internet and mobile services consultant.

C.an Internet gambling operator.

D.a telecommunications analyst.

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗