10-15分钟的文字汇报多少字

解题思路：①已知加入200g12%的氢氧化钠溶液，所以可以计算出氢氧化钠的质量．②氢氧化钠裸露空气中易吸水而潮解，所以放在小烧杯中；③由图可知，酒精灯内的酒精太多，会引发失火，酒精不能超过酒精灯体积的[2/3]；加热烧杯，为了受热均匀，要垫石棉网．

（1）200g12%的氢氧化钠溶液，则氢氧化钠为：200×12%=24克，天平指针向右偏转，说明砝码重，氢氧化钠太少，则应该加NaOH直至天平平衡．
（2）由图可知，酒精灯内的酒精太多；加热烧杯，没垫石棉网．
故答为：（1）24克 潮解，
（2）灯内酒精太满，没垫石棉网（提示：天平规则：“左物右码”．）

点评：
本题考点： 实验操作注意事项的探究；称量器-托盘天平；碱的化学性质．

考点点评： 本题主要考查实验操作的注意事项；还应掌握溶液中溶质的计算方法．了解托盘天平的使用．

先给你说一个1千瓦的电器用一个钟头就是一度电.
按每天15分钟算15X31＝465分钟 （即7.75小时）
60瓦X7.75＝465瓦 （即0.465度电）
0.465X0.6＝0.279块钱 不贵放心烧吧

3.lifelong education
手打自编,费时半小时,希望加分.字数不够,可以联系.大意是高考完的四人ABCD进行考后聊天,牵扯出题目.
A: Hail for passing the entrance exams of the university!B,C,D,how were you doing in the exams?
B: Hard to say. They were all grueling tests.
C: Come on. You are great at English. You had studied 3 hours a day for three years to prepare.Your intensity to learn English is almost unimaginable.You must get a high score on the English subject!
B:I have to work hard. Because 25 percent of the grade is based on English.I think this study experience help me know that education is lifelong.
D: I can't agree more with you.School teaches us how to gather, learn, and apply knowledge. No matter what career we choose, we will need to learn procedures, information, and skills related to our jobs, and execute tasks based on that information and training.We should educate ourselves no matter where we are nor what we do.So education is lifelong indeed.
A: No !No! Is education a tsunami, washing away other things? I hope I will not have any exams after graduation! I don't want any kind of education any more. Nor does exams.
B: Oh,A. For me ,Education doesn't refer to exams.Education tells me that Where there is a will there is a way.It gives me a Strong character .when I get into trouble,I’m also brave to overcame. By taking examination,I improved my courage. By studying together,I understood the importance of teamwork.Most important of all,after education ,we youth finally became a mature.
A: So it is.You don’t throw the baby out with the bathwater. Although I don't like exams, anyway, hail for lifelong education!

Molding Head Setup
Depending on head size of up to four people to install,with 10-15 minutes when
First,the preparatory work
1.Ready to load more than 2 head 2 times the weight of hoisting with the software,tiled on the ground,will head slowly scroll to the hoisting belt,hung on the crane hook at both ends of the preparations for lifting.Lifting strictly prohibited within the zone from the nose through to avoid lifting the nose when the stretch deformation
2.Cleaning the nose spindle hole and the dust on the machine spindle,on a little oil to make installation smooth.
2,the installation
1 will be connected to suit the machine spindle
2 lifting the nose,so that shaft hole and spindle docking,rotating spindle,so that a key on the spindle head of the keyway with the machine in a level line
With the power of three cranes,one to operate cranes,two flat push the nose to make the connection with the spindle sleeve connected.Such as the push into the strenuous,operable crane,so that machine spindle nose parallel,non-impact head with heavy objects to prevent head deformation,affecting the nose life
4 confirmed installed after the cable car down,fastening the nose,installed complete
Unloading head 5 by the reverse operation of 虽说是抄的.但查了机子,确实是这样...汗...

（1）200g12%的氢氧化钠溶液，则氢氧化钠为：200×12%=24克，天平指针向右偏转，说明砝码重，氢氧化钠太少，则应该加NaOH直至天平平衡．
（2）由图可知，酒精灯内的酒精太多；加热烧杯，没垫石棉网．
故答为：（1）24克 潮解，
（2）灯内酒精太满，没垫石棉网（提示：天平规则：“左物右码”．）

三人在校园相遇的对话.不知你是否喜欢?
人物:Xiao Ling (X),Yani,(Y) Songtao(S)
地点:校园
Xiao Ling is on her way to the dormitory.She drops a book and Yani and Songtao who happen to be right behind her,pick up the book and give it back to her.
Y:Excuse me,is this your book?
X:Thank you so much.
Y:You are welcome.Are you a new admit?
X:yes.I just came to register yesterday.My name is Xiao ling.Nice to meet you.
Y:My name is Yani.Nice to meet you,too.This is my friend since childhood,Songtao.
S:hi!We both came from xxx.
X:really?I am from there too.We are all town fellows aren’t we?.It’s such a small world.
Y:absolutely.We both majored in computer science.What’s yours?
X:accounting.I don’t really like it.But my parents said this school offers excellent accounting programs and it will be easier for me to get a job later on.
S:I picked my own major because I know what I want.I just like computers a lot.I would like to be a computer programmer in the future.
Y:Well,I don’t know wether I really like it or not.I just follow Songtao where he goes.
X:I feel bad for those students who make it to the top but had to quit school because of short of money.
S:My parents paid some of my tution and I said to myself that I want to be somebody.But no matter how much I do,I will never be able to repay parents for what they do for me.
X:yeah.I agree with you.
S:look.The boys are playing basketball now.I will join them.See you !
X:let’s keep in touch,ok?
Y:ok.Here is my cell phone number.12345678
X:this is mine.22334455.I am so glad to meet you.Take care!
Y and S:bye!

第4个：A: Hey,Jane, long time no see! How are you?
B:Fine, thank you, and you?
A: Well, not too bad.
B: So, where did you go? You seemed to be disappearing for so long.
A: I went to Beijing with my family. Then we went to many places of interest.
B: Wow, you must enjoy yourselves very much!
A: Yeah, we really had a very good time! You should have a try next time.
B: Eh,I hope I can!
A: Well, I have a dream when I grow up.
B: What's that?
A: I hope I can travel around the world someday.
B: You will! Best wishes.!

The interview information access points:restaurant,do know the score 10-15 minutes to arrive at the interview place in not too casual,nervous when doing deep breathing loud,let others understand you report direct staff,but not staring at them,confident and honest

该了：）
5个人:jack,ellen,allen,Bob,peter
Jack:hey guys,i got a big big news for you all.
ellen:say it,Jack!
Bob:what is it?Jack.
peter:wait,let me guess first...is it all about allen?
jacK:yah,how do you know that peter?
bob:duh（苯的意思：） ）!caz(becase的口语） allen is the most weird guy in our grade.
jack; yeah,but i heard that he got in fight last night,and i saw he went to office this morning.
Bob:poor allen..
ellen:hey,allen is pretty nice and friendly though,caz he had helped me one time when i ask him to get the book for me.
Bob; yeah..yah that remind me something!
jack&peter:what?
bob:i saw him fought against some bully in the hallway one time..
Jack&peter:yeah,he ain't bad at all!
ellen:see!you guys should never judge a book by it's cover!
（allen walks in)
Bob:hey allen,what is up
allen:not much,what do you guys gathering over there for?
jack:emm,we just talked about you.,and...
peter:and we thought that you aren't bad although you fight a lot.
ellen:yeah,but that is okay if you could stop fight with others.
allen:sure,Ms.Berg just told me about the consequence of a fighting.
jack:that is good,anyway,tell us about this fight,did anyone get hurt?
allen:no,but i'll tell you what!they started first.
ellen:so you has to tell ms.berg that!
peter:did you?
Bob:stop guessing your guys,let hear what allen say.
allen; oh well,i did,but he said he will go ask this guys first before he can make some decision.
ellen:okay,we all trust you and ms.berg and you,so you'll alright!
allen:thanks guys.
Bob:tell us what were the guys that you fought with,we'll help you find out.
jack:sounds good to me.
allen:i dont know their names,but i'll say they were some sort of gangster.Because they all wore sweater that's wrote "trop" on it.
Peter:okay,we'll notice it,when we see it!
ellen:i think we shouldnt get into this,because the gangsters are bad,they will beat us up if he realize the whole thing!
Peter:don't be a chicken!
Bob:what do you think allen?
allen:i am really happy that you guys really wanna make me feel better,but,i think ellen is right about one thing that the fighting isn't the solution to this.
peter:dont worry about this people,guys,i can get my brother to fight for us.
Bob:you mean the athlete one with big muscle,and always want to show off with it?
Peter:hey!
Bob:i am sorry.
jack:okay let settle this down!ms.berg is coming!

The Little Horse Crosses the River 小马过河
CHARACTERS IN THE PLAY:LITTLE HORSE,MOTHER HORSE,COW,SQUIRREL
剧中人物：小马,马妈妈,牛,松鼠
THE SCENE:By the river（河边）
[Enter the little horse and the mother horse with a bag]
Little horse:Mummy,I’m as tall as you.I grow up now.Let me carry the bag for you.
Mother horse:My dear.I’m glad you have grown big and can help me now.Take this bag of rice to your Uncle Pig,will you?Little horse:Yes.Mummy.Where dose Uncle Pig live?
Mother horse:He lives on the other side of the river.
Little horse:Mummy,I’ll get back soon.Bye-bye.Mother horse:Bye-bye.
[Exit] [Enter the cow] －－－－－ [hide=-1] Cow:Hi,Little Horse!Where are you going?
Little horse:Aunt Cow,I have to go to Uncle Pig’s house.Is there a bridge near here?
Cow:No,there is not any.If you want to go to his house,you have to cross the river.
Little horse:Is the river deep?And can I wade across?
Cow:No,it isn’t deep.I just came back from the other side,and the water only reaches my calf.
Little horse:Thanks,Aunt Cow.I’ll cross the river.
[Enter the little squirrel] Squirrel:Stop!Stop!The river is so deep that one of my fellows had been swept.
Little horse:It’s so lucky not to wade!
Cow:It isn’t deep.Little Horse,you can wade across the river.
Squirrel:It’s very deep.You can’t wade across the river.You will get drowned.
Little horse:But the water is deep or not?Shall I go on or shall I go back?I’d better go home and ask Mummy.
Cow and Squirrel:(together) Yes.You’d better ask your mummy.
[Enter the mother horse]-www.***.net
Little horse:Mummy,Mummy.Aunt Cow said that the river was not deep.I could wade across the river.But Brother Squirrel said that it was very deep.I couldn’t wade across the river.What should I do?
Mother horse:My child,both Aunt Cow and Brother Squirrel are right in their own way.Aunt Cow’s body is big,so she said the water was shallow.Brother Squirrel’s body is small,so he said the water was deep.You should think everything over by yourself.
Little horse:Oh,I see.I should try it myself.Little horse:(wades across the river) Mummy,in fact,it is not difficult to wide across the river.
Mother horse:My dear.No matter what happened,we should think it over and try it myself.Little horse:Yes,Mummy![/hide]
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这里里面

（1）200g12%的氢氧化钠溶液，则氢氧化钠为：200×12%=24克，天平指针向右偏转，说明砝码重，氢氧化钠太少，则应该加NaOH直至天平平衡．
（2）由图可知，酒精灯内的酒精太多；加热烧杯，没垫石棉网．
故答为：（1）24克 潮解，
（2）灯内酒精太满，没垫石棉网（提示：天平规则：“左物右码”．）