4、甲、乙、丙三人进行下列实验：各取30.0mL同浓度的盐酸(密度为1.0g/cm³)，加入同一镁铝合金粉末后产生的气体及有关数据如下：

试求：(1)盐酸溶液中溶质的质量分数。(2)合金中镁、铝的质量比。

3、甲乙丙三位同学分别取铁粉和铜粉的均匀混合物与某稀硫酸反应，所得数据如下：

(1)求金属混合物中铁的质量分数是多少？

(2)甲制得多少克硫酸亚铁？

(3)求稀硫酸溶液中溶质的质量分数为多少？

2、某学生做锌和硫酸溶液反应的五组对比实验，实验结果记录如下：

(1)表格中X=　　　　 g；Y=　　　　 g。

(2)上述五组实验中，反应后硫酸有剩余的是　　　　　　 (填组序号)

(3)若该实验用的稀硫酸密度为1.10g/mL，列式计算稀硫酸的溶质质量分数。

1、某实验小组的同学为了测定实验室氯酸钾样品的纯度，取一定质量的该样品与1g二氧化锰混合，其总质量为6g。依次加热该混合物t₁、t₂、t₃、t₄时间后，分别冷却称量剩余药品的质量，记录的有关数据如下表所示(样品中的杂质不参与化学反应)：

试计算：(1)完全反应后产生氧气的总质量为　　　　 (2)样品中氯酸钾的纯度为多少？

第三节　 书面表达(满分25分)

假设你是小明，你家打算改善住房条件。现有两套房子供选择：一套是郊区的传统式平房，一套是位于商业区的现代公寓楼。家人对购买哪套更好持不同的观点。请你根据下表所给内容，用英语给你的朋友Paul写一封信，征求他的意见。

注意：1. 表达须包括所提供的所有信息，并可适当发挥；2. 词数：100左右；3. 开头已为你写好，不计入总数。 4. 参考词汇：郊区 suburbs

Dear Paul,

Recently my family are planning to improve our housing conditions

第二节　 短文改错(共10小题；每小题1.5分，满分15分)

此题要求改正所给短文的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上划一个勾(√)；如有错误(每行只有一个错误)，则按下列情况改正：

该行多一个词：把多余的词用斜线(\)划掉，在该行右边横线上写出该词，并也用斜线划掉。

该行缺一个词：在缺词处加一个漏字符号(∧)，在该行右边横线上写出该加的词。

该行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。

注意：原行没有错的不要改。

Did you enjoy yourself yesterday? I suppose you do．　　　 81．

But I had a very terrible day yesterday. Everything　　　　　 82．

went wrong. In the morning, your alarm clock didn't ring, so　 83．

I woke up late. I was in such hurry that I burnt my hand while 84．

I was preparing breakfast. Then I ran out the house to catch　 85．

the 8:30 bus. That was the bus I normal took. I missed it. I was 86．

worried so my teacher hated the students coming late to　　　 87．

school. As a result, I ran three mile to school. When reaching　 88．

to the classroom, I found all the classmates were in the　　　 89．

classroom and I felt ashamed. How a bad day it was!　　　　 90．

第一节　 单词拼写(共10小题；每小题1分，满分10分)

根据下列句子及所给汉语注释，在答题卡上相应题号的横线上写出空缺处各单词的正确形式。(每空只写一次)

71. With his ___(杰出的)talent he did very well in his new job.

72. They showed their__(满意)with our service during the conference.

73. My grandparents live in a beautiful village with many trees ___(包围)it.

74. The chairman ___(评论)that the meeting was a great success.

75. The students are ___(捐赠)books to poorer children now.

76. He is strict with himself and never ___(缺席)from school.

77. With the help of all the ___(教练)，he has made great progress.

78. Why not __(查阅)a dictionary when you come across new words?

79. Only 200 children are ____(获准进入)into the school every year.

80. There is no need to be ____(担忧)about our health.