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Pleas e________ quiet. Let's have a meeting.( )

A. do                      B. very

C. take                   D. be

 

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科目:初中英语 来源: 题型:单选题

---Eddie has     e-dog at home.

---Oh, really?


  1. A.
    the
  2. B.
    a
  3. C.
    an
  4. D.

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科目:初中英语 来源: 题型:阅读理解

实验室用铜制取硫酸铜,将适量硝酸分多次加入到铜粉与稀硫酸的混合物中,加热使之反应完全,通过蒸发、结晶得到硫酸铜晶体。
(1)为了节约原料,硫酸和硝酸的物质的量之比最佳为:    ;为了吸收该反应中产生的尾气,请选择下列中合适的装置       

(2)为符合绿色化学的要求,某研究性学习小组进行如下设计:
第一组:以空气为氧化剂法
方案1:以空气为氧化剂。将铜粉在仪器B中反复灼烧,使铜与空气充分反应生成氧化铜,再将氧化铜与稀硫酸反应。
方案2:将空气或氧气直接通入到铜粉与稀硫酸的混合物中,发现在常温下几乎不反应。向反应液中加少量FeSO4,即发生反应,生成硫酸铜。反应完全后,加物质甲调节pH ,铁元素全部沉淀(一般认为铁离子的浓度下降到10-5mol·L-1,就认为沉淀完全),然后过滤、浓缩、结晶。
已知:Ksp[Cu((OH)2]≈10-22, Ksp[Fe((OH)2]≈10-16,  Ksp[Fe((OH)3]≈10-38
请回答下列问题:
如开始加入的铜粉为3.2 g,最后所得溶液为500 mL,溶液中含有铁元素0.005 mol。
①方案1中的B仪器名称是       
②为了使铁元素全部沉淀,应调节pH至少为_________。
③方案2中甲物质可选用的是             
A.CaOB.NaOHC.CuCO3D.Cu2(OH)2CO3 E、Fe2(SO4)3
④反应中加入少量FeSO4可加速铜的氧化,用离子方程式解释其原因        
第二组:过氧化氢为氧化剂法
将3.2g铜丝放到45 mL 1.5mol·L-1的稀硫酸中,控温在50℃。加入18mL 10%的H2O2,反应0.5h,升温到60℃,持续反应1 h后,过滤、蒸发浓缩、减压抽滤等,用少量95%的酒精淋洗后晾干,得CuSO4·5H2O 10.5g。
请回答下列问题:
⑤反应时温度控制在50℃~60℃不宜过高的原因是         
⑥本实验CuSO4·5H2O的产率为         

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科目:初中英语 来源:2012年初中毕业升学考试(广东广州卷)英语(带解析) 题型:阅读理解

Paul and Jason were brothers who lived and worked on neighbouring farms.For 35 years they farmed side by side,sharing machinery and goods as needed,without a single problem.
However,one autumn,things changed.It began with a tiny disagreement about a horse,which grew into a major difference.The difference led to angry words,followed by weeks of silence between the two brothers.
One morning there was a knock on Paul’s door.He opened it and saw a builder holding his toolbox.“I’m looking for a few days’work,”the builder said.“Are there any jobs here I could help with?”
“Yes,”answered Paul,extremely pleased to see the builder.“I do have a job for you.Look at that farm across the creek(小溪).That’s my brother’s farm.That creek used to be a grass field,but last week my brother dug a path from the fiver and made the creek.But I’ll go him one better.See that pile of wood?1 want you to build me a fence,two metres tall,so 1 won’t need to see him anymore.”
The builder said thoughtfully.“I think I understand the situation and I'll be able to do a job that pleases you.”
Paul had business in town that day and left the builder to his work.When he returned,the builder had just finished his job.Paul was shocked.Instead of a fence there was a bridge,stretching from one side of the creek to the other.
As Paul stood on the bridge,staring in amazement,his younger brother Jason,came across,and took Paul’s hand.“You are a good man to have built this bridge after a11 I've done,”said Jason.
Then,Paul,with tears in his eyes,said to the builder who was packing his bag to go,“Thank you so much。Please stay.I have much more for you to do.”
“I’d love to.”the builder said quietly,“but,I have many more bridges to build.”
【小题1】What was the cause of the disagreement between the two brothers?

A.The digging of the creek.
B.A problem about a farm animal.
C.Who owned the field between the farms.
D.Who would pay for building the fence.
【小题2】The underlined expression“go him one better”in paragraph 4 means         ·
A.do something even worseB.improve the situation
C.point out his mistakeD.help him out
【小题3】What do we know about the brothers?
A.They had been fighting for many years.
B.Their farms were not very successful.
C.They finally realized their mistakes.
D.They liked building bridges.
【小题4】Why did the builder build the bridge?
A.He needed a way to get across the river.
B.There was not enough wood for the fence.
C.He misunderstood Paul’s instructions.
D.He wanted to bring the brothers together.
【小题5】In what order did the following take place in the story?
a.The brothers stood on the bridge.
b.Jason dug the creek.
C.The brothers became angry with each other,
d.The builder asked for work.
e.Paul went into town.
A.b,c,e,d,a    B.c,b,d,e,a
C.b,e,c,a,d    D.c,d,b,a,e

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科目:初中英语 来源:2012届浙江省宁波市初三3月月考英语试卷 题型:写作题

假如你叫张蒙,班主任王老师想了解班级同学的状况,以便有针对性地对学生进行考前心理疏导。请你根据下面的内容要求,给班主任王老师写封e-mail,说明自己的情况,并请她给你提一些建议。
内容要求:
1、学习任务重,睡眠不足,缺少体育活动。同学间缺乏沟通和交流。
2、在家不允许看电视、上网、听音乐等。
(参考词汇:have a lot of homework to do , not have enough time to sleep, do sports, talk/communicate, be not allowed to ,surf the Internet, listen to music)
注意:
1、字数80左右。文中不得出现真实的校名、姓名。
2、开头和结尾已给出。不计入总词数。
From: zhangmeng@163.com To:chlw524@sina.com   Subject: problems Date: March 23
Dear Ms. Zhang,
I’m very glad to write to you.                                        
                                                                             
                                                                              
                                                                              
                                                                              
                                                                             
                                                                             
                                                                              
Best wishes,
Zhang Meng

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