意识是物质世界长期发展的产物。下列能正确反映意识产生的历史演进顺序的选项（    ）

①滴水穿石       ②根系沃土       ③敬德保民      ④犬吠非主

下列营养物质中，能为人体生命活动提供能量的（    ）

①糖类 ②脂肪 ③蛋白质 ④水 ⑤无机盐．

增加：在缺词处加一个漏字符号（∧）并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词；

2）只允许修改10处，多者（从第11处起）不计分。

    When I was a very young children, my father created a regular practice I remember well years late. Every time he arrived home at end of the day ,we'd greet her at the door. He would ask who we was and pretend not to knowing us. Then he and my mother would have had a drink while she prepared dinner and they would talk about his day and hers. While they chat, my father would lift my sister and me up to sit in the top of the fridge. It was both excited and frightening to be up there！My sister and I thought he was so cool for putting us there.

原题：如图①，点 $E,F$ 分别在正方形 $ABCD$ 的边 $BC,CD$ 上， $\angle EAF=45°$ ，连接 $EF$ ，则 $EF=BE+DF$ ，试说明理由．