大神解决根据汉语提示完成句子26-30

CO2+NaOH==Na2CO3+H2O拜托各位大神
咋样生成碳酸氢钠?

help help大神

恳求如何计算效率同比提高拜托各位大神
如06年产量240-300个,07年产量300-350个,效率同比提高是14.28%,还有06年单价是0.2-0.22元,07年单价是0.18-0.2元,同比下降了9%,是如何计算出来?我在先谢拉!

英文大神
today, roller skating is easy and fun. but a long time ago, it wasnˊt easy at
all. before 1750, the idea of skating didnˊt exist. that changed because of a
man named
joseph merlin. merlinˊs work was making musical instruments. in
his spare time he liked to play the violin. joseph merlin was a man of ideas and
dreams. people called him a
dreamer.
　　one day merlin received an
invitation to attend a fancy dress ball. he was very pleased and a little
excited. as the day of the *** came near, merlin began to think
how to
make a grand entrance at the ***. he had an idea. he thought he would get a
lot of attention if he could skate into the room.
　　merlin tried
different ways to make himself roll. finally, he decided to put two wheels under
each shoe. these were the first roller skates. merlin was very proud of
his
invention and dreamed of arriving at the *** on wheels while playing the
violin.
　　on the night of the *** merlin rolled into the room playing
his violin. everyone was astonished to see him. there was just one problem.
merlin had no way to stop
his roller skates. he rolled on and on.
suddenly, he ran into a huge mirror that was hanging on the wall. down fell the
mirror, breaking to pieces. nobody forgot merlinˊs
grand entrance for a
long time!
1. the text is mainly about how
people enjoyed themselves in the 18th century.
a)
t
b)
f
2. people thought merlin was a
dreamer because he was full of imagination.
a)
t
b)
f
3. merlin put wheels under his
shoes to give the people at the *** a surprise.
a)
t
b)
f
4. merlin ran into the room and
was knocked down by the wall.
a)
t
b)
f
5. the last paragraph told us
merlinˊs roller skates needed to be improved.
a)
t
b)
f

(x-y-x+y/4y^2)(x+y-x+y/4x^2)/(3(x+y)-x-y/8xy)拜托各位大神
(x-y-x+y/4y^2)(x+y-x+y/4x^2)/(3(x+y)-x-y/8xy)详细,

改错大神help
1 i like the coffee has sugar.
2 there is a swiming pool next to my house.
3 i'll visit to the summer place tomorrow.
4 elsa is in room 1860 wendy lives in room.elsa lives five floors over wendy.
5 i really want go fishing with you

英语大神进来一分钟!
You should raise your voice to make yourself heard (by others) at the meeting.成分分析

Ｃan you believe the dream come true?拜托各位大神
Ｉ believe it . many children belive the dream come true .And some children can not believe it .In fact.three people have a same dream . and your dream can be come true .Do you agree it?

y=-2x+6x-1拜托各位大神
已知二次函数y=-2x+6x-1.当x在什么范围内时,y随x的增大而增大?当x在什么范围内时,y随x的增大而减少?

英语语法问题 大神帮忙 I arrived in london in the middle of
英语语法问题 大神帮忙
I arrived in london in the middle of July. I (had been) told that london (was) covered in fog all year round。
请问为什么不能前面括号中是was 后一个括号里是had been

RFs::GetDir如何应用拜托各位大神
下面是读目录的代码 RFs myRFs; myRFs.Connect(); CDir *dir = NULL; User::LeaveIfError(myRFs.GetDir(KReadDir,KEntryAttNormal,ESortByDate,dir)); TBuf readFileName; _LIT(KNewLine,"n"); _LIT(KNullDir,"This is null dirctoryn"); if (dir->Count()) { for (TInt i = 0; i < dir->Count(); i++) { readFileName = (*dir)[i].iName; readFileName += KNewLine; console->Printf(readFileName); } } else { console->Printf(KNullDir); } delete dir; dir = 0; delete console; myRFs.Close();运行程序后,报出“Exit type 2,65,E32USER-CBase"是什么原因造成的呢

英语语法大神
The teacher told the students that light travels faster than sound,是宾语从句吗,为什么呢,不是有宾语the students了吗

I don't think they are careful enough,_____?拜托各位大神
_____这里填倒装句.

180°-30°20'拜托各位大神
这类型的计算题怎么做的?满多少进一?是不是等于149°40' 谁能出一些这样的题目给我?

大神help

I love you shan shan拜托各位大神
I love you, say we together baby, you and me. I can only give my life, and show you all I am, in the breath I breathe. I will promise you my heart, and give you all your need, if you take some time. if you tell me you don't need me any more, that our love won't last forever

14.75x6.88-8.75x6.88+14.75x3.12-8.75x3.12拜托各位大神
一道数学题 用简便方法算

求救各位英语大神!
The largest brain __71__ examined belonged to a person of weak mind 这个空为什么填ever不填once
Mental tests which are reasonably __74__ show no differences in intelligence between races. 为什么填accurate不填certain

英语作业大神帮忙
Normally a student must attend a certain number of courses in order to graduate, and each course which he attends gives him a credit which he may count towards a degree. In many American universities the total work for a degree consists of thirty-six courses each lasting for one semester. A typical course consists of three classes per week for fifteen weeks. While attending a university a student will probably attend four or five courses during each semester. Normally a student would expect to take four years attending two semesters each year. It is possible to spread the period of work for the degree over a longer period. It is also possible for a student to move between one university and another during his degree course, though this is not in fact done as a regular practice.
For every course that he follows a student is given a grade, which is recorded, and the record is available for the student to show to prospective employers. All this imposes a constant pressure and strain of work, but in spite of this some students still find time for great activity in student affairs. Elections to positions in student organizations arouse much enthusiasm. The effective work of maintaining discipline is usually performed by students who advise the academic authorities. Any student who is thought to have broken the rules, for example, by cheating has to appear before a student court. With the enormous numbers of students, the operation of the system does involve a certain amount of activity. A student who has held one of these positions of authority is much respected and it will be of benefit to him later in his career.

6.Normally a student would at least attend ________ classes each week.
A) 10 B) 12 C) 15 D) 20
7. According to the first paragraph an American student is allowed ________.
A) to live in a different university
B) to take a particular course in a different university
C) to live at home and drive to classes
D) to get two degrees from two different universities
8.The pressure of future career is felt by American university students mostly because of the r ecord of their ________.
A) academic performance B) social activities
C) personal conduct D) leadership abilities

数学大神进来.高一题目求解
http://zhidao.baidu.com/question/175718379.html 想不通中心对称和对称中心有什么关系.对称中心不是轴对称么,轴对称和中心对称一样吗.为什么解题用的是(kπ+π/2,0)而不是原点呢

完成14-15 大神帮忙!