题目内容

【题目】某水体中含有较多的泥沙及其他悬浮物,下列物质中不能用来净化此水的是( )

A. KCl B. Fe2(SO4)3

C. KAl(SO4)2 D. FeCl3

【答案】A

【解析】Fe2(SO4)3、FeCl3可产生Fe(OH)3胶体,能用于净水,KAl(SO4)2溶液可产生Al(OH)3胶体,也可用于净水。

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【题目】短文改错

下面短文中有10处语言错误。请在有错误的地方增加、删减或修改某个单词。

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,多着(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 het 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.

When I was a very young children,my father created a regular practice I r

Child emember well years late.Every time he arrived home at ∧end of the day ,

later the we’d greet herat the door.He would ask who we was and pretend not to knowing him were know 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 chatted

me up to sit in the top of the fridge.It was both excited and frightening to be up there!

on exciting

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