摘要:请听四段对话.完成第5至第8小题. No.5. Woman: Can I help you, sir? Man: Yes, please. Some bread. No. 6. Woman: Jim, are you taller than your mother? Man: Yes, but my father is the tallest. No. 7. Woman: Do you usually come to school by bike? Man: Yes, but I came to school on foot this morning. No. 8. Woman: What are you going to do this Saturday morning? Man: Nothing much. Why? Woman: Would you like to go shopping with me? Man: I’d love to. 请听一段对话.完成第9和第10小题. (Sounds of knocking on the door) Man: Come in, please. Good morning, Mary. Girl: Good morning, Dr. Smith. Man: What’s your trouble, Mary? Girl: I don’t feel well today and I have a headache. Man: I’m sorry to hear that. Now, open your mouth and say “ah . Girl: Ah-ah! Man: You’ve only got a cold. Go and get some medicine and you will be all right soon. Girl: Can I go to school this afternoon? I’ll have an English test tomorrow morning. Man: Sure! You can go to school as usual, but you’d better go to bed earlier than before. Girl: Thank you, Doctor! 请听一段对话.完成第11和第12小题. Boy: Good afternoon. Woman: Good afternoon. Can I help you? Boy: Yes, my name is Jim. I want to borrow some books, but this is the first time. What should I do? Woman: First, you should get a library card. Boy: Do I have to pay for it? Woman: It is free for students under 18 years old. I’m sure you are under 18. Right? Boy: Yes, I’m only ten years old. Woman: But you should bring a letter from your teacher to show your name and your school. Boy: I see. Thank you very much. Woman: My pleasure. 请听一段对话.完成第13至第15小题. Woman: Have you read today’s paper? Man: No, I haven’t seen it yet. Why? Woman: I really like the story on the front page. Man: Really? What’s it about? Woman: It’s about some lovely pandas. So interesting! Man: Well, I guess I will have to read it later in the day. Woman: Why later in the day? Haven’t you got the paper yet? Man: Well, I won’t get it until early in the evening. Woman: That’s terrible. I get it at nine every morning. Man: How do you do that? Woman: I buy it on my way to work. Man: I should do that, too. Maybe I can get it at eight in the morning. 请听一段独白.完成第16至第18小题. Good afternoon, everybody. Welcome to our school. You’re lucky to be the students of this school. But at the beginning of the school, you may meet some difficulties. In the first few months, spend some time walking around the school and find out what it is like. Do your best to get used to the living here and get to know your teachers and classmates. Try to understand what you are expected to do at school. This will help you become clear about your own plan. During this time you have to study hard to pass the exams. But what's more important for you is to learn how to learn. Think about what you want from the school and try your best to make your dreams come true. You may have some problems in your studies. Learning is not always a pleasant journey. Some of you may find your studies are not exciting and think of stopping it. At this moment, just think it over before you make the decision. For learning is important for you. It will help you make your future life better. Our school can answer your real learning if you can make up your mind to go through with it. This is what I like to say to you now. Thank you. 请打开第Ⅱ卷.看第一大题听力试题.该试题需要在第Ⅱ卷第一大题的相应位置上作答. 第Ⅱ卷

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某合作学习小组欲用生石灰制取氢氧化钠固体,他们将少量生石灰放入烧杯中,再向其中加入一定量碳酸钠溶液,充分反应冷却后过滤、洗涤得到固体A和溶液B.请你写出发生反应的化学方程式  

请你与小组同学共同完成以下探究:

【查阅资料】NaOH、Ca(OH)2的溶解度

温度(℃)

0

20

40

60

80

100

NaOH溶解度(g)

31

91

111

129

313

336

Ca(OH)2溶解度(g)

0.19

0.17

0.14

0.12

0.09

0.08

【提出问题1】固体A中的成分是什么?

【猜想与假设1】

甲同学:只有CaCO3

乙同学:CaCO3,Ca(OH)2

乙同学猜想可能含有的Ca(OH)2理由是  

【实验与探究】甲、乙同学为了验证各自的猜想,分别进行了实验:

实验内容

实验现象

实验结论

甲同学:取少量固体于试管中,再加入稀盐酸.

有气泡产生

自己的猜想正确

乙同学:取少量固体于试管中,加水充分振荡,过滤,向滤液中滴加 酚酞溶液 

溶液由无色变为红色

自己的猜想正确

【反思与评价】小组同学讨论后认为,甲同学的实验不能证明他的猜想,理由是

 

结合甲、乙两同学的实验能证明乙同学的猜想正确,因此小组同学确定了固体A的成分.

【提出问题2】溶液B中溶质的成分是什么?

【猜想与假设2】

丙同学:NaOH,Na2CO3

丁同学:NaOH,Ca(OH)2

戊同学:NaOH

【表达与交流】结合对固体成分的探究,同学们经过讨论确定了丁同学猜想正确,

理由是 

该小组同学欲将溶液B加热浓缩,加热不久,溶液出现浑浊,只好停止加热,请解释加热时溶液出现浑浊的原因  

该小组同学立即变换方案,向溶液B中继续滴加碳酸钠溶液至不再产生沉淀为止,过滤,再将滤液加热蒸发,冷却结晶,过滤得纯净的氢氧化钠固体.

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某合作学习小组欲用生石灰制取氢氧化钠固体,他们将少量生石灰放入烧杯中,再向其中加入一定量碳酸钠溶液,充分反应冷却后过滤、洗涤得到固体A和溶液B.请你写出发生反应的化学方程式  

请你与小组同学共同完成以下探究:

【查阅资料】NaOH、Ca(OH)2的溶解度

温度(℃)

0

20

40

60

80

100

NaOH溶解度(g)

31

91

111

129

313

336

Ca(OH)2溶解度(g)

0.19

0.17

0.14

0.12

0.09

0.08

【提出问题1】固体A中的成分是什么?

【猜想与假设1】

甲同学:只有CaCO3

乙同学:CaCO3,Ca(OH)2

乙同学猜想可能含有的Ca(OH)2理由是  

【实验与探究】甲、乙同学为了验证各自的猜想,分别进行了实验:

实验内容

实验现象

实验结论

甲同学:取少量固体于试管中,再加入稀盐酸.

有气泡产生

自己的猜想正确

乙同学:取少量固体于试管中,加水充分振荡,过滤,向滤液中滴加 酚酞溶液 

溶液由无色变为红色

自己的猜想正确

【反思与评价】小组同学讨论后认为,甲同学的实验不能证明他的猜想,理由是

 

结合甲、乙两同学的实验能证明乙同学的猜想正确,因此小组同学确定了固体A的成分.

【提出问题2】溶液B中溶质的成分是什么?

【猜想与假设2】

丙同学:NaOH,Na2CO3

丁同学:NaOH,Ca(OH)2

戊同学:NaOH

【表达与交流】结合对固体成分的探究,同学们经过讨论确定了丁同学猜想正确,

理由是 

该小组同学欲将溶液B加热浓缩,加热不久,溶液出现浑浊,只好停止加热,请解释加热时溶液出现浑浊的原因  

该小组同学立即变换方案,向溶液B中继续滴加碳酸钠溶液至不再产生沉淀为止,过滤,再将滤液加热蒸发,冷却结晶,过滤得纯净的氢氧化钠固体.

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6月5日是世界环境日,今年的主题是“海洋存亡,匹夫有责”,开发海洋,维持海洋的可持续发展是每个地球公民的神圣职责.请回答下面关于海洋的几个问题:
问题一:今年5月,我国浙江沿海发生大面积的“赤潮”,造成养殖业重大损失.赤潮的发生主要是与因为藻类的疯狂生长,与藻类疯长的密切相关的元素是______和______.(填元素符号)


问题二:海水中资源丰富,含量最多的金属阳离子是______(填符号),含量最多的分子是______(填符号),海水中除含有大量的氯化钠外,还有氯化镁、氯化钙等物质,则下列结构示意图所表示的微粒一定在海水中含有的是______.(填序号)
问题三:我国舟山盐场海水晒盐的原理是______.
A、氯化钠的溶解度受温度影响较大 B、因氯化钠溶解度受温度影响不大,故采取蒸发水分的方法所得粗盐中主要含泥砂、氯化镁、氯化钙等杂质,现对其进行提纯,主要操作流程如下:

(1)操作①的名称是______,操作②的名称是______.
(2)A溶液是______,B溶液是______.(选择合适序号填空)
a、Na2CO3     b、K2CO3    c、H2SO4   d、HCl
问题四:经勘察,深海下含有丰富的“可燃冰”,可满足人类1000年的能源需要.该物质是一种晶体,晶体中平均每46个水分子构建成8个笼,每个笼可容纳1个CH4分子或1个游离H2O分子.若晶体中每8个笼只有6个容纳了CH4分子,另外2个笼被游离H2O分子填充,则天然气水合物的平均组成可表示为______.
A、CH4?14H2O  B、CH4?8H2O  C、CH4?(23/3)H2O   D、CH4?6H2O
若该水合物可表示为CH4?nH2O,则其与氧气完全燃烧的方程式如下,请将括号中的化学计量数补充完整:
CH4?nH2O+2O2数学公式CO2+______H2O.
问题五:海水淡化是国际上研究的热点问题,我国科学家在利用高分子膜进行海水淡化的研究上取得了一些成绩.如图1,左侧为海水,右侧为经过一段时间后由左侧经高分子膜渗透得到的淡水,分析高分子膜在海水淡化过程中的作用______.

问题六:如图2为某学生制作的一种家用环保型消毒液发生器:原理是电解饱和氯化钠溶液,制得的消毒液有较强的杀菌能力,该反应是利用氯化钠和水在电解条件下生成NaOH、H2和Cl2,请完成化学方程式.
______.
该消毒液中起消毒作用的物质是NaClO(次氯酸钠),它是由氯气和NaOH进一步反应制得的,方程式为:2NaOH+Cl2=NaCl+NaClO+H2O.请模仿写出Cl2与消石灰作用制取漂白粉的化学反应方程式:______.

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