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2010 Shanghai World Expo will launch underground network of 700 kilometers of pi

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2010 Shanghai World Expo will launch underground network of 700 kilometers of pi

_______2010 Shanghai World Expo will launch          underground network of 700 kilometers of pipes to provide natural hearting and cooling.

       A．The; an     B．The; the    C．不填；the D．不填；an

试题答案

A

标签：undergroundlaunchnetworkofshanghai

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