[单选题] Tom is _____________ boy in our class.

1、[多选题]brokerage models include（）

• A、marketplace exchange
• B、content-targeted advertising
• C、buy/sell fufilment
• D、bounty broker

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2、[判断题]incentive market provides incentives, such as redeemable points or coupons for customers for making purchases from associated retailers.（ ）

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3、[判断题]Metamediary model can facilitate transactions between buyer and sellers, and it get involved in the actual exchange of goods or services between the parties.（ ）

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4、[判断题]Subscription fees are incurred irrespective of actual usage rates.（ ）

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5、[判断题]www is a system of Internet servers that supports hypertext to access several internet protocols on a single interface.（ ）

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