The figure is a statistical chart of all kinds of books in a county library. It is known that there are 9 more agricultural books than medical books. How many books are there in this library?

9600 ／ (45% - 25%) = 9600 ／ 20% = 48000 (volumes) a: there are 48000 books in this library

Library English composition
What can I do and what can't I do in the library

In the library,you can read many books.You can study and do homework.But you cannot speak loudly in the library.Also you cannot eat or drink in the library.You can borrow the library books and take th...

On the English composition of Library
Help me translate two sentences
This book must be returned in five days
2. The library opens at 8 a.m. and closes at 5 p.m
There are also some sentences about the introduction of the library. Please help me think about them

1.This book 5 days later will have to return.
2.Library in the morning 8 o'clock opening,in the afternoon 5 o'clock closure.

Go to the library to borrow 60 words of English composition (suitable for junior high school students)

A few days ago, my mother gave me a library card. I was asked to borrow books on Sunday to increase the amount of reading. I went there. In fact, I like reading very much. I went in to have a look. There are too many books there! I don't know which one to borrow! I thought: I'll come to borrow books often. It's great here. I opened a Book casually and was attracted all of a sudden! I went to the service desk to borrow this book, and then went home happily
A few days ago,my mother gave me a Library card.Let me read books,to increase on Sunday.I went,in fact I love reading.I entered and looked,and there's book is too much!I wonder what the borrowed!I want to borrow some books I will often:wonderful ,here.I opened a book that attracted!I go to the reception borrow the book,and then happily back home.

How to add four operation symbols in the middle of six six equal to 100
There must be an operation symbol between 6 and 6

When there must be an operation symbol between 6 and 6:
The results of "addition", "subtraction" and "multiplication" of 6 and 6 are all divisible by 3 and 2, and the number divisible by 3 has such a property that the addition of all numbers can be divisible by 3, while the number divisible by 2 is only even. So we come to a conclusion that if the result of 6 through four operations is not divisible by 3, only "division" participates in the operation
Now we just need to consider the case of division. Because the result of division is only 1 or 2, so 100-1 = 99 or 100 + 1 = 101 or 100-2 = 98 can not be generated by the other four sixes (the reason has been explained in the first paragraph), only 100 + 2 = 102 is possible, but 102 can not be generated by the other two sixes (the maximum is 6 * 6 = 36), It is concluded that 100 can not be obtained from six sixes by four operations

2. Two pieces of wood a and B with mass m ` m are stacked on a smooth horizontal table. The dynamic friction coefficient between a and B is μ. Now a horizontal tension f is applied to B to make a and B move to the right relatively still. The displacement s is. In this process, what is the work done by force F to object B? What is the work done by friction force to object a?

Because AB remains relatively static, they have the same acceleration A. please tell me which one is on the top, otherwise it can't be done! Forget it, let's assume that a is on the top: because f acts directly on B, the work done by F on B is w = FS, and the friction force exerted by a on B is f = UMG

In the arithmetic sequence {an}, A2: A4 = 7:6, then S7: S3 =?

S7:S3
=[7(a1+a7)/2]:[3(a1+a3)/2)
=7(a1+a7):3(a1+a3)
=7*2a4:3*2a2
=2

When an object starts to move in a straight line with uniform acceleration from static state, and the displacement in the first second is 3 m, the displacement in the first three seconds is 3 m_ m. The displacement in 3S is_ m. The velocity at the end of the second second is_ M / s, the velocity at the beginning of the third second is_ M / S; the acceleration during the whole movement is___ m/s^2

When an object starts to move in a straight line with uniform acceleration from static state, and the displacement in the first second is 3M, the displacement in the first 3S is 27 m, and the displacement in the third is 15 m; the velocity at the end of the second second second is 12 m / s, and the velocity at the beginning of the third second is 18 m / S; the acceleration in the whole process of motion is 6 m / S ^ 2
According to the formula: S = 0.5at & # 178;
Calculation acceleration: 3 = 0.5a1 & # 178;, a = 6m / S & # 178;
S3=0.5×6×3²=27（m）
S2=0.5×6×2²=12（m）
Displacement in the third second: 27-12 = 15 (m)
According to the formula: v = at
V2=6×2=12(m/s)
V3=6×3=18（m/s）

Xiao Li's mother is 32, which is 6.4 times her age. When Xiao Li's mother is 3.7 times her age, how old is Xiao Li?

4 x = 32, x = 5. Xiao Li is 5 years old. 32 + x = 5 (5 + x), x = 5

A mathematical problem (equation) in grade one of junior high school
It takes 20 seconds for a train to enter a 300m tunnel at a constant speed and pass through the tunnel completely. A fixed light at the top of the tunnel shines on the train for 10 seconds to calculate the length of the train body

Well, OK
Well, first of all, does the time when the light at the top of the tunnel shines on the train have anything to do with the position of the light in the tunnel? Think about it well? No. It's the same everywhere. It only has something to do with the speed and length of the train, right?
If you can't figure out this problem, think like this. Now there is no tunnel. There is a scarecrow on the side of the train. The Scarecrow's eyes are a beam of light, just looking at the train. Then this scarecrow is the light, isn't it? Next, build a greenhouse above the scarecrow, and put some stones on the top of the greenhouse and around it. Is it a tunnel? OK, it should be understandable
Let's talk about the algorithm
Is the time for the Scarecrow's eyes to see the train the distance from the locomotive to the tail divided by the speed of the train?
(because the Scarecrow's eye to see the length of the train must be the length of the train, and the speed? Is also the speed of the train, so time is the length of the train divided by the speed of the train.)
You can think like this: is the speed of the train seen by the eyes of the scarecrow the speed of the train relative to the scarecrow? Suppose the length of the train is l and the speed is V, then V multiplied by 10s equals L
Let's look at another one. How to understand from entering a 300m tunnel to completely passing through the tunnel? That is, the section from the locomotive entering the tunnel to the locomotive leaving the tunnel, plus the section from the locomotive leaving the tunnel to the train tail leaving the tunnel, then the sum of the length of the train + the length of the tunnel divided by the speed is the time, 20s, right? The binary linear equation can be solved
Have you ever learned the quadratic equation of two variables? If not, the first formula will not move. In the second formula, you will bring in numbers and letters, and then transform the formula to get how much l is equal to, followed by a V with coefficient plus another number, and then l is equal to 10V of the first formula. Then write the two formulas that are equal to l together to solve them. The process of solving is carried out on the draft paper, Don't write down the unit. Bring the unit of quantity "m" or "m" after calculation
If you don't know what to say, I'll explain it again

The figure is a statistical chart of all kinds of books in a county library. It is known that there are 9 more agricultural books than medical books. How many books are there in this library?