High﹣speed railways have developed rapidly in our country． Today China has high﹣speed rail network（铁路网） among all the countries in the world．（ ）
A．longB．longer
C．the longerD．the longest
High﹣speed railways have developed rapidly in our country． Today China has high﹣speed rail network（铁路网） among all the countries in the world．（ ）
A．longB．longer
C．the longerD．the longest
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