增加：在缺词处加一个漏词符号(/\)，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：在错的词下画横线，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。

    On Sunday, Miss Green told Lisa, Jack and Lily a story about a girl names Cathy, who is just 12 years old. One day, when she was at the home, her mother careless cut her finger, which immediately started bleeding. As a little girl, Cathy didn't get a panic. Instead, she calmly cleaned her mother wound and then stopped it from bleed. She did that so she had just learned how to give first aid. Then Miss Green encouraged both of them to learn more about first aid. “It's really important because it can not only helps deal with injuries but also save life,” she said. After hearing it, they decide to learn first aid skills.

某一溶液由盐酸、碳酸钠、稀硫酸、氯化铜、氯化钠中的一种或几种混合而成．现向该混合溶液中滴入氢氧化钡溶液，产生的沉淀质量与加入氢氧化钡溶液体积如图所示，则下列判断正确的是（    ）

已知$\frac{1}{a}$＋$\frac{1}{b}$＝$\sqrt{5}$(a≠b)，求$\frac{a}{b\left(a-b\right)}$－$\frac{b}{a\left(a-b\right)}$的值．

当摘除了一朵花的某个部分后，这朵花就不会再发育成果实，这个部分是（　　）