单选题：Asanonlineretailer,Amazonhasvariousrivals,suchasWalmart,eBay

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题目内容：

Asanonlineretailer,Amazonhasvariousrivals,suchasWalmart,eBay,andlotsofnewcompanies.
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答案解析：

Questions are based on the following passage．In his new boo

Questions are based on the following passage．In his new book Creative Intellig

分类：英语六级  题型：单选题
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