根据提示写成语。

①请写出“水”开头的四字词语:水天一色____   ____ 

②ABCC式词语:血迹斑斑____ ____

阅读下面短文，然后根据括号内所给汉语意思写出单词的正确形式（每空一词）。
    When I was young and free, I____ （梦想）of changing the world. As I____ （成长）older and wiser, I discovered the world would not change,____ （因此）I shortened my sights and ____ （决定）to change only my country. But it, too, seemed____ （不可能）.Later, I settled for ____ （改变）only my family , those closest to me, but also, they would have none of it. And now as I ____（躺）on my deathbed, I suddenly____ （意识）: If I had only changed ____ （我）first, then by example I would have changed my family.____ （从）their inspiration and encouragement, I would then have been able to better my country and, who knows, I possibly have been changed the world.

里，其资本构成见右图。对此理解正确的是(  )

①中国交通运输完成近代化

②清政府重视铁路交通事业

③甲午战争后外国资本输出加剧

④政府禁止民间资本参与铁路修筑

如图，矩形ABCD中，E为BC上一点，DF⊥AE于F．

（1）△ABE与△ADF相似吗？请说明理由．

（2）若AB=6，AD=12，BE=8，求DF的长．