David Beckham advertising Vodafone is an example of ___________ .
David Beckham advertising Vodafone is an example of ___________ .
中国大学MOOC: David Beckham advertising Vodafone is an example of ___________ .
中国大学MOOC: David Beckham advertising Vodafone is an example of ___________ .
以下哪些属于电信运营商？（） A: AT&T B: CMCC C: Vodafone D: Docomo
以下哪些属于电信运营商？（） A: AT&T B: CMCC C: Vodafone D: Docomo
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