图为“探究馒头在口腔中的变化”的实验设计，图中试管均置于37℃温水中10分钟，以下说法正确的是（　　）

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(∧)，并在其下面写上该加的词。

删除：把多余的词用斜线(\)划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

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。

    Last summer I had a chance to visit Paris. That attracted me most was the Eiffel Tower, where has become a symbol of France. I was deeply impressed by their height. I have never seen such tall building before! It is made of iron and it is about 7000 tons heavy. There have 1711 steps from the bottom to the top. Climb the tower made me very tired, but I was very exciting. I took a lot of photo in Paris.

    I have much memories and experiences to share. I will remember my trip to the France forever!