问答题
设置内联框架嵌入“1.html”,高300,宽500,不显示边框,不显示滚动条。
设置内联框架嵌入“1.html”,高300,宽500,不显示边框,不显示滚动条。
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单项选择题
The method of value creation in the era of mobile Internet is____.
The method of value creation in the era of mobile Internet is____.
A.scope economy
B.economies of scale
C.Economies of scale + economies of scope