问题 选择题

根据下列实验得出的结论,正确的是

A.某固体加入稀盐酸,产生了无色气体,证明该固体一定含有CO32

B.某溶液中滴加BaCl2溶液,生成不溶于稀硝酸的白色沉淀,该溶液中一定有SO42

C.验证某烧碱样品中是否含有Cl,先加入稀盐酸除去OH-,再加入AgNO3溶液,有不溶于稀硝酸的白色沉淀出现,证明含有Cl

D.某无色溶液滴入酚酞溶液后显红色,该溶液不一定是碱溶液

答案

D  

题目分析:A.活泼金属加入稀盐酸也会产生气体;B.溶液中含有银离子也会产生同样现象;C.加入的盐酸中也含有氯离子,也会产生同样现象,无法证明原溶液中含有氯离子;D.显碱性的溶液都能使无色酚酞试液变红色,故使酚酞溶液显红色的溶液不一定是碱溶液.

单项选择题 A1型题
完形填空

阅读下面的短文,然后按照要求写一篇150词左右的英语短文。

Dear Ms Jordan,

 I am sorry for misbehaving in class .I won't do it again.

                                               Tyler Vincent Turner

This is a letter of apology that my six-year-old son Tyler wrote to his teacher .It was simple enough and took less than five minutes to write, but I hoped the message I was sending to Tyler was one that would have a lasting effect.

When I made the decision, I hoped it was the right thing to do .It turned out that Ms Jordan was thrilled when she received the note . She told me that in her 25 years as a teacher no student had ever written her a letter of apology for misbehavior . She literally looked like she was going to cry.

I want him to realize that he is responsible for his behavior, good or otherwise .That’s why I decided to make him write the letter of apology .I didn’t tell him what to write--- the words were his own. And he did so without any reluctance and gave it to his teacher this morning with a verbal apology. If it happens again, he’ll have to write another letter. Taking responsibility for your own actions should start as young as possible and a six-year-old boy is certainly old enough.

[写作内容]

1. 以约30词概括短文的要点。

2.然后以120词就“道歉信”这一主题发表看法,并包括如下要点:

1)你曾经写过道歉信给老师吗?

        2)假如你在课堂违反了纪律,你会给老师写道歉信吗?为什么?

[写作要求]

1. 可以使用实例或其他论述方法支持你的论点,也可以参照阅读材料的内容,但不得直接引用原文中的句子;

2. 文中不能出现真实姓名和学校名称;

3. 标题自定。

[评分标准]

概括准确,语言规范,内容合适,篇章连贯。