噢,想也是長江三峽大壩,應該至少幾百年沒有問題
所有跟帖:
• “幾百年”這個可保不齊。”三峽是重力壩,相當於幾個或幾十個水泥塊放在基岩上。 -wanttosaysomething- ♀ (0 bytes) () 07/16/2019 postreply 16:56:07
• “幾百年”這個可保不齊。”三峽是重力壩,相當於幾個或幾十個水泥塊放在基岩上。 -wanttosaysomething- ♀ (0 bytes) () 07/16/2019 postreply 16:56:07
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