不久前科学家成功用硅原子排列出世界上最小的元素符号──Si。在元素周期表中硅元素的某些信息如图所示，下列有关硅的说法错误

（1）冷水的质量：
m=ρV=1.0×10 ³ kg/m ³ ×2000m ³ =2×10 ⁶ kg，
水需要吸收的热量：
Q _吸 =cm△t=4.2×10 ³ J/（kg•℃）×2×10 ⁶ kg×（45℃-15℃）=2.52×10 ¹¹ J；
（2）若无烟煤完全燃烧放出的热量全部被水吸收，则
每日需要无烟煤的质量：
m=
Q 放
q =
Q 吸
q =
2.52× 10 11 J
3.4× 10 7 J/kg ≈7.4×10 ³ kg．
答：（1）水需要吸收的热量为2.52×10 ¹¹ J；
（2）每日需要无烟煤的质量约为7.4×10 ³ kg．

A．硅元素的原子序数为14，故A错误；
B．根据化学元素汉字名称的偏旁可辨别元素的种类，固态非金属元素名称有“石”字旁，因此硅属于非金属元素，故B 错误；
C．硅元素的相对原子质量为“28.09”，故C正确；
故选C．
D．根据在原子中，原子序数=质子数=核外电子数，所以该元素的核外有14 个电子．

Not long ago,every evening after work when the workers,there is a crowded market,but now the car to change the line,there is no market out.

Dear manager:Not long ago,I bought a Sony radio from your store for 100 dollars.But after 10 days'use,I got something wrong with it.I feel so sorry to bother you,but I think that the store should take...

人译
I realized the significance of helping others from today's activity and got a happy feeling of cooperation with our classmates,I can't help thinking of the great mass fervour of helping others lately in our society.I believe that this spirit is essential in our society at any time.We need to improve our mental qualities,and eager to help others,only in this way that our society will be more harmonious.

解题思路：根据题目所给新信息（“碳纳米管温度计”中的液态的金属镓，当温度升高时，管中镓就会膨胀，通过电子显微镜就能读取温度值，这种温度计测量的范围可从30℃到490℃等）、结合所学知识进行分析判断即可．

A、纳米碳管的热膨胀率极低，可以作体温计的外壳，纳米碳管的体积10℃至500℃之间随温度变化很小，可忽略不计，故选项说法正确．
B、因为金属镓这种温度计测量的范围为从30℃到490℃，所以金属镓的熔点很低，沸点很高．故选项说法错误．
C、金属镓在纳米碳管制成的温度计内受热膨胀，所以金属镓在此温度测定范围内变化明显、均匀，呈正比，故选项说法正确．
D、金属镓的体积在30℃到490℃之间随温度变化很小变化很小，但由于其用于温度计测定温度变化情况，并且通过电子显微镜观察变化读取数值，不能忽略不计；故选项说法错误．
故选AC．

点评：
本题考点： 碳元素组成的单质；金属的物理性质及用途．

考点点评： 本题有一定难度，考查纳米碳管、金属镓的性质及灵活运用所学知识进行解题的能力，培养了学生分析、解决问题的能力．

1.On a recent day,I want to decorate my room 2.I went to several shops to find some

本题只说“温度计测量的范围可从30 ℃到490 ℃,并且精确度较高”但一定要成正比吗?
你见过欧姆表吧,也不是均匀刻度.
题目并没有说“均匀刻度”,也就不一定是正比

1、不能去掉。“竟然”能表达出意想不到、出乎意料的意思，强调了塑料垃圾之多。
2、①很难自然降解；②破坏土壤；③选成动物死亡；④污染大气。
3、用具体事例说明塑料袋的危害。
4、答案示例：拒绝白色污染，共迎绿色奥运。远离塑料袋．走进美好生活。（突出主题，语言精当，即可）

从法律角度上说,手机被老师没收是违法的.但你又能把老师怎样呢? 毕竟他们是为我们着想哦,但学校生活不会只有课堂吧?我想自觉一点,手机也可以增进师生的情感的.

A、生物的呼吸离不开氧气，呼吸作用的产物应是二氧化碳和水，这个没有必要继续研究．所以A说法不正确；
B、生物体内大约百分之七十的水，所以B说法正确；
C、生命的起源于水里，所以C说法正确；
D、水是生物生理活动的载体，所以D说法正确．
故选A．

As a high school student, I consider English a very important subject. In order to learn it well, apart from English class, I took an active part in English corner and other after-class English activities, which benefit me a lot.
In the English corner, I meet many friends, who share the same interest with me. Besides, sometimes, some foreigners are glad to join us. By talking with them, my oral English improved a lot. I also find it useful to keep English diaries. I keep on doing it these years and it is helpful to my English. As a saying goes, practice makes perfect. Only by practice will we make more progress. Finally, some good English study websites contribute a lot to my improvement. Through these websites, I can read some classic English passages, poems and stories. What’s more, I can learn some learning skills and methodologies, which play an important part in my study process.
All in all, every road leads to Roma, but I believe hard work pays off.

考查提纲作文
本文是一篇提纲类写作。涉及语言学习类话题，此话题是学生最熟悉的话题之一，语言学习是学生每天必不可缺少的事情，因此，本话题贴近学生生活，让学生有话可写。符合高考是命题思想。考生成文时应注意：1.采用三段成文的结构；2.内容要点：A参加英语角的益处；
B坚持写英语日记的作用；C英文阅读网站（EnjoyReading）对你的帮助。3.时态：一般现在时；4. 人称：第一人称；4. 适当使用连词使文章流畅、通顺；5. 注意使用一些高级词汇和句型为文章增光添彩。

解题思路：由题干知，“有了水的存在，就可以进一步探索火星上是否曾有过生命．”所以本题作为“进一步探索”就是水与生命是密切的，没有水就没有生命．

A、生物的呼吸离不开氧气，呼吸作用的产物应是二氧化碳和水，这个没有必要继续研究．所以A说法不正确；
B、生物体内大约百分之七十的水，所以B说法正确；
C、生命的起源于水里，所以C说法正确；
D、水是生物生理活动的载体，所以D说法正确．
故选A．

点评：
本题考点： 水的性质和应用．

考点点评： 本题贵在让学生知道水的重要性，人体离不开水，没有水就没有生命，从而在生活当中要节约用水．

D

Dear John,
It has been 2 weeks since you left here, I would like to say thanks to you for I've made amazing progress in English study with your help.I will continue working hard on my study.
I also have a good news to tell you. I won a prize in English speech contest. I feel so proud of I myself ,and I know you will be happy for me ,too. I miss you my friend, I watered the tree we planted together everyday, I hope it can grow higher when you are back one day. Our class had a baskateball match with calss 3. It was a very fuuning match. If you were here, you would enjoy it very much.
Do you have good time recently? Please write to me soon .
Your's Lihua

我也有缺憾,在人们都期待的世博会开幕时,我和全家也去看,那里人山人海.我们逛啊逛,就到了10点了,突然澳大利亚馆,有重心开放了,妈妈让我们去,可是我不愿意,硬要回家.等到落幕时,我才留有缺憾.我认为这种缺憾是无法弥补的,体会给你留下一块深深的烙印,但是只要以后不再留有这种遗憾,就行了

One possible version:
As a high school student, I consider English a very important subject. In order to learn it well, apart from English class, I took an active part in English corner and other after-class English activities, which benefit me a lot.
In the English corner, I meet many friends, who share the same interest with me. Besides, sometimes, some foreigners are glad to join us. By talking with them, my oral English improved a lot. I also find it useful to keep English diaries. I keep on doing it these years and it is helpful to my English. As a saying goes, practice makes perfect. Only by practice will we make more progress.
Finally, some good English study websites contribute a lot to my improvement. Through these websites, I can read some classic English passages, poems and stories. What’s more, I can learn some learning skills and methodologies, which play an important part in my study process.
All in all, every road leads to Roma, but I believe hard work pays off

是金子就会闪光，你终究会被大家认识和接纳的，每个人都各有所长，每个人都能在班级中找到自己的位置，谁都无法替代。

解题思路：2910=2×3×5×97，因为六年级的学生的年龄大约是十岁左右，所以2910=10×3×97，又他得意地告诉张兰，说明成绩很好，不可能只得了3分，应是97分，那么这次竞赛他的名次就是第3名、年龄是10岁、成绩是97分．

因为2910=2×3×5×97，又六年级的学生的年龄大约是十岁左右，
所以2910=10×3×97，
那么可以推断这次竞赛他的名次就是第3名、年龄是10岁、成绩是97分．
答：他的名次就是第3名、年龄是10岁、成绩是97分．

点评：
本题考点： 年龄问题．

考点点评： 本题关键是想把2910分解质因数，然后结合六年级的学生的实际年龄范围得出年龄，再求名次和成绩就简单了．

Your cousin in study abroad, he will finish school, recently returned from whether work asked your opinion about English composition.

B

根据元素周期表中的一个小格所提供的信息，原子序数，相对原子质量，进行分析解答本题．
根据元素周期表中的一个小格所提供的信息，可知硅元素的原子序数为14，元素符号为Si，名称为硅，相对原子质量为28.09，选项A，C，D 正确，
故选B．
本题考查学生根据元素周期表中的一个小格所提供的信息进行分析解题的能力．

解题思路：王晓刚不久前过了第10个生日，可他爸爸才过了9个生日，判断出王晓的爸爸的生日是二月29日，只有闰年才有，四年才过一次生日．

因为王晓爸爸的生日是二月29日，只有闰年才有．

点评：
本题考点： 平年、闰年的判断方法．

考点点评： 此题考查了闰年和平年的区别．

颜色是蓝的,就可能是男的,小章章

not long before

先让他寄100万美元回来再回答他.

My experience of learning English after class
I'm glad i have won the first prize in the English Contest, which completely contributes to my after-class English learning.
I often take part in the English Corner and practice speaking English. There are many participants in the corner and we can talk about any topics in English. By doing this, I have improved my pronunciation and intonation. Most important of all, I have conquered my shyness and timidness. I can talk to anybody boldly in English. So I didn't feel nervous in the contest at all.
At the same time I insist on keeping diaries in English every day. I will try my best to bring what I have learnt to use. Thus my knowledge has been reviewed and enlarged.
I also visit English reading websites to read much. Learning English depends on reading widely and largely. Those sites provide many English articles of all levels and I can find appropriate ones to read. The dictionary in the computer can help me deal with the new vocabulary quickly. Therefore I benefit much from the reading.
Above are my three main learning methods of learning English after class. They are helpful and convenient to me. I hope they are also beneficial for you.

就是说某东西有双面性,它即有好处也有坏处,就像你和我,也必定有优点和缺点吧,例如你读书不怎么好,却会去关心他人,你成绩不好,打机却敏于其他人,这就双面性,世界上什么东西都会有双面性.只要你细心去发掘!

首先,你要熟悉元素符号4个角上的数字代表的意义
左上角：质量数,即中子数+质子数
左下角：原子序数,即核电荷数,质子数
左上角：电荷数,即化合价,前面带有正负号
左下角：个数,即在该化学式中这个原子的数目
熟记这个之后那你看咯,8 18O就是说这个名为O的元素,它的质量数为18,质子数为8.
那中子数就是10个.1个原子里有10个,一个分子是2个构成,就有20个
1mol就有20mol
另外说一句,为什么说这个比黄金贵百倍,像这样的同位素,都是用粒子加速器加速中子流不断轰击氧的原子核,使中子强行进入原子核而获得.
而粒子加速器超费电,制造一个这样的氧原子,其耗费的电力高昂,成本确实比黄金贵百倍!
你看看元素周期表最后面的那些人造元素,那全是通过类似的方法,只不过改成用质子流轰击,强行塞质子到原子核里增加它的质子数,就得到110多位以后的元素了.
维持一个粒子加速器所需的电力足够让一个城市瘫痪!

Dear Tom,
Thanks for your concern.I am so sad that I was knocked out in the preliminary, because I just paid a little attention to the competition and not prepared more.On the other hand, I felt very nerious when the competition began. For these reason, I know I should pay more attention all competitions and should prepare before take part in them, and I should control my feelings. I think I can success next time,
yours,
Li Hua

A

- -绝对不是,估计是楼主你挑了另一个状态= =,最简单的方法：初始化.（计算机的壳上又叫你如何弄初始化的）,希望能帮助到您.

二楼、三楼的有一些问题
应该只是新原子
因为Hf 这种元素早就发现了
我国科学家合成的只是它的一种新的同位素
明白?

June 8th
Dear Jianhua,
I’m very glad to have received the letter you sent me two weeks ago . I’ve been thinking about the question you asked me . In my opinion, you should come back after you finish your studies abroad. For one reason, what you are studying is badly needed nowadays in China. It will be quite easy for you to find a good job. In fact, I know a few big companies in our city are hoping to hire people like you. For another reason, I think it will be much more convenient for you to look after your parents as they are getting old. Therefore, I think it’s a good idea for you to return. So what are you waiting for?
Best wishes,
Minghua

Elliot,a little boy full of fantasy,there's the old thinking of make fun of his brother and a sister also less likely to speak Gertie,brother and sister recently divorced mother of three and live with.Busy with the bad mood,so mothers and children often ignore the care and communication.ET,a companion accidentally been left in the little alien on Earth,was lucky to be good little Elliot found himself behind his mother secretly left alone and helpless received ET,give it to eat chocolate,also to introduce it to their dogs,brother and sister,though the language ET and Elliot can not communicate,but they were really across all the external obstacles linked together,although their appearance has so much differences,but they all have a good sensitive,eager to love and care of innocence.Between them,and establish a wonderful telepathy,ET sad time,Elliot will feel depressed,ET sick,Elliott also followed uncomfortable.Lonely lonely Elliot ET and became best friends,so they are no longer alone.Until one day,ET inevitably be found in adults.A living alien!This has to be it!So people guard,police,army,FBI ......flocked to adults regardless of begging children,mercilessly captured ET,simply ignore it at this time was so innocent,vulnerable and desperate,They just want to put the alien as a precious golden guinea pig study.Elliot and his brother with the help of partners from the research center was finally rescued near escape of ET,big surprise that people did not let them down all sorts of barriers along the intention of blocking this "rescue teams" to the eyelids in adults bottom,ET demonstrated its incredible magical power,to bring everyone out of the "encirclement." ET had found in the woods,to take ET back to the alien ship arrived and never got to finally go home,ET,and reluctantly Elliott and his extraterrestrial friends goodbye,looking far to the spacecraft across the sky beautiful sunset,Elliot know that he will always remember this short but beautiful friendship.
有空的话用谷 歌搜下
----------上述翻译为机器翻译

Long long ago=once_____upon a time_____;
不久前：some time_____ago；不久前：a while____ago
some time本身就表示【一段时间】

解题思路：（1）依据人为因素对水域环境的严重污染，影响了该生态系统中的生产者、消费者和分解者的生存，严重破坏了生态平衡与自动调节的能力分析；（2）废水中重金属的来源分析，工业废水中的镉、铬、铅、汞等分析；（3）依据水生植物、动物的呼吸作用和水生植物的光合作用分析，生物的呼吸作用是细胞内有机物在氧的参与下被分解成二氧化碳和水，同时时放出能量的过程，绿色植物通过叶绿体，利用光能把二氧化碳和水合成有机物，释放出氧气并且储存能量的过程叫光合作用．

（1）黄河某段水域的生态平衡被严重破坏，并在短期内无法恢复的原因是：黄河水域是一个生态系统．由于人为因素对水域环境的严重污染，影响了该生态系统中的生产者、消费者和分解者的生存，严重破坏了生态平衡与自动调节的能力，导致很难在短期内得到恢复；
答：黄河水域是一个生态系统．由于人为因素对水域环境的严重污染，影响了该生态系统中的生产者、消费者和分解者的生存，严重破坏了生态平衡与自动调节的能力，导致很难在短期内得到恢复；
（2）河水中所含有害人体健康的3种重金属元素是废水排放污染的，主要是镉（Ca），铬（Cr），铅（Pb），汞（Hg）等；
答：黄河水中所含有害人体健康的重金属元素有：镉（Ca），铬（Cr），铅（Pb），汞（Hg）等；
（3）午夜时水中的水生植物、水生动物发生呼吸作用，消耗水中大量氧气；而午后光照最强，水温增高，水生植物光合作用增强，产生大量氧气；①水温增高，饱和值下降；　②光照增强，光合作用产氧量增加；因地制宜控制该地水污染的措施①污染较重的小工业停产；②对工农业及生活污水进行处理；③减少枯水期用水，使流量增加；④调整生产过程，适当在洪水期排污．
故答案为：水温增高，饱和值下降；光照增强，光合作用产氧量增加；污染较重的小工业停产、对工农业及生活污水进行处理、减少枯水期用水，使流量增加．

点评：
本题考点： "三废"处理与环境保护．

考点点评： 本题考查了三废处理与环境保护的方法分析判断，掌握基础注意知识积累，题目难度中等．

During my senior year of high school, after I had learned that I had received enough scholarships to attend a major university, I sat down and studied all of the majors that were available to me. Two of them really stood out, due to my personal interests: English and mathematics.

Dear zhanglan,
l am very glad to have received the letter you sent me two weeks ago. In my opinion, you should come back to China based on the following reasons.
Firstly, there is large demand in job market in China. As far as I have known, there are job seminars in almost every day in Shanghai and twice per week in other big cities. And more and more global businesses have been entering China. You must have more space to develop you skills and knowledge. At addition, you will have more room to get promoted in your career.
Secondly, your family is in China. In the long run, they will be more and more dependent on you. I also hope we can have close communication and take care of our relatives together.
So, I strongly recommend you can settle down in China as soon as you finish your study. If you have any other question, please feel free to ask me.
Best wishes,
Wangyan

1．指电脑程序
2．因为网络程序有漏洞，会给网络黑客以可乘之机；
3．人们的思维存在漏洞，体现在程序设计中就成了程序的漏洞
4．本文主要运用了举例子、作比较的说明方 法；(举例略 )
5．可以从多个角度来回答，如对电脑的漏洞、“补丁”的融解，打“补丁”的意义等（言之成理即可）

Hello, mike:
I'm li hua, a high heart you are about to finish school. At the same time I hope you can come to China work life. Because there are a few points
Much more job opportunities in China than in Britain, it is a good place.
In China, your major will be very popular, so that you find a job is very convenient.
At the same time come to China, you will experience the Chinese traditional culture, is also very good.
If you come to China, I will help take care of you.
Hope to see you as soon as possible!
Li hua
请采纳,谢谢~

解题思路：科学家合成了一种新型的氧分子O₄．有关O₄的说法：
A、单质是由同种元素组成的纯净物；
B、因为新型的氧分子O₄为纯净物，所以一个O₄分子中不可能有含O₂分子；
C、它的相对分子质量=16×4=64；
D、新型的氧分子O₄每个是由四个氧原子构成．

A、单质是由同种元素组成的纯净物，因此它和O₂、O₃都是氧元素组成的单质，故此选项正确．
B、因为新型的氧分子O₄为纯净物，所以一个O₄分子中不可能有含O₂分子，故此选项错误．
C、它的相对分子质量=16×4=64，故此选项正确．
D、每个O₄是由四个氧原子构成，故此选项正确．
故选B．

点评：
本题考点： 氧元素组成的单质．

考点点评： 此题是对O4相关问题的考查，只要利用已学过的知识对新物质O4进行分析探讨即可，属基础性知识考查题．

Our class had a discussion about whether we should use a cell phone in school.Our class teacher suggests that we should not use it in school.But 45% students are against the teacher.They think长度限

你好,写得相当不错,我只是稍加修改了一下,括号内的是修改的或增加的内容.祝你成功,加油!

How to Learn English Well
Hello I am Li Hua and your schoolmate. I‘m very happy to share my experience(s 用复数,同后面的I hope they are...相对应) of learning English here .I hope they are useful to you.
Learning a language ,a good environment is important . For the reason ,joining in a(用an,Ehglish是元音开头的）English corner is a goog way to improve spoken English and listening English.Besides this ,keeping on writing English diaries（改为writing diary in English) is a good idea. If you like suring(surfing 单词拼错了）on the Internet ,Enjoy Reading ,a website which is about English reading is a good place to improve reading . Of course , listening English songs ,writing English articles,listening to English radios are good ways to learn English as well.
In short ,you can always find a way which suits yourself.But I must tell you,the most （important) point is persistence .As Mr Li Yang said :"Nothing can take the place of pesistence in the world !" It's true .Without persistence ,you can do nothing.So ,just try ! (You will benefit from it.)

解题思路：可以根据物质的性质和用途等方面进行分析、判断，从而得出正确的结论．

A、因纳米碳管的热膨胀率极低，所以纳米碳管的体积在测定温度范围内随温度变化很小，可忽略不计；故正确；
B、因液态镓用于纳米碳管内制成温度计可知其熔点较低，沸点很高；故不正确；
C、金属镓在纳米碳管制成的温度计内受热膨胀，所以金属镓在此温度测定范围内变化明显、均匀，但不会成反比例；故不正确；
D、金属镓的体积在此温度测定范围内变化很小，但由于其用于温度计测定温度变化情况，并且通过电子显微镜观察变化读取数值，绝对不能忽略不计；故不正确．
故选A

点评：
本题考点： 碳元素组成的单质；金属的物理性质及用途；物质的微粒性．

考点点评： 此题考查纳米碳管及金属镓的性质及应用，针对题给信息及相关知识进行分析解答，培养学生分析、解答问题的能力．

问的是动能之比?
F＝GMm／R²＝mV²／R
得GMm／2R＝mV²／2
可见相同质量的卫星的动能与M成正比,与R成反比
所以E1:E2＝5／1.5所以是C

draw 及物动词 要接宾语
paint 既是及物动词又是不及物动词 所以选B

你自己想着写就可以啦,这样会提高你的写作水平的,努力吧!我支持你.

Dear Tom
Thank you for your care about 。i took part in the English speech contest ,i thank it was a very good chance to exercise yourself,but i was very tense in the contest .i was eliminate .but ...

Since mid-April 2009, influenza A H1N1 influenza spread rapidly around the world, a serious threat to these people's lives. Requests for such flu-like symptoms, modes of transmission and ,