Understanding of the original sentences in beauty over a hundred years She knows that only the flower of discovery and creation can have eternal beauty. So she is willing to let acid and alkali gnaw her soft hands and let the choking smoke wrinkle her beautiful forehead Tell me what you read and what you think of?

From it, I understand Madame Curie's contribution to human beings at her own appearance and life
The value of man in the world lies not in his appearance and money, but in his contribution to the world
I don't know if it can help you. I've tried my best. If it can help you, give it to me. If it can't, I'm sorry

Great fame is the text across a hundred years of beauty in which words

Fame

Lesson 18 beauty across a hundred years, a new era

A new theory. I've done it

You and your classmates play the game of stone, scissors, and paper. In each game, what's the probability that you can be right and what's the probability that you can guess wrong? Urgent!

My chances of winning and losing are 1 / 3
Similarly, if I give scissors or cloth, the chance of winning or losing is 1 / 3
And if it comes out randomly, the probability that I come out to any of the three scissors, stone and cloth is 1 / 3
So if my classmates and I are randomly selected, the chances of winning and losing are [3 * (1 / 3) * (1 / 3)] = 1 / 3, and the other 1 / 3 chance is a draw

A piece of 80 cm long and 40 cm wide rectangular iron sheet is welded into a uncovered rectangular iron sheet
A piece of 80 cm long and 40 cm wide rectangular iron sheet is welded into a uncovered rectangular iron box, which can not be spliced. What should we do to maximize the volume of the iron box

In order to maximize the volume, and reasonable, so the height of the cuboid is set to 1 cm, so: 78 times 38 times 1 equals 2964

A chair is 65% cheaper than a table. The price of a table is three times that of a chair. How much are the tables and chairs?

If the price of chair is x, the price of table is 3x
3X-X=65
2X =65
X=32.5
So the price of the table is 3x = 3 * 32.5 = 97.5
A: the price of chairs is 32.5 and that of tables is 97.5

A rectangular board is 2 meters long and 1 meter wide. How many square meters is it? How many square decimeters is it?

Area = length times width = 2 square meters = 200 square decimeters

The number ratio of story books to science and technology books in the book corner of a class is 1:8. Later, students bought 5 story books, and the number ratio of story books to science and technology books in the bathroom is 1:4
How many books were there in the book corner?

Arithmetic:
Number of original science and technology books
=5÷（1/4-1/8）
=5÷1/8
=40 copies
The total number of books originally shared
=40÷[8/（8+1）]
=40÷8/9
=45 (this)
Equation method
If the original story book is x, the original science and technology book is 8x
（X+5）：8X=1：4
8X=4（X+5）
2X=X+5
X=5
8X=5*8=40
5 + 40 = 45
Answer: there were 45 books in the book corner

Find the general term formula 1,2,5,12,27
It's not a requirement and it's a requirement for the general term formula,

Let the original sequence be an
a1=1 a2=2 a3=5 a4=12 a5=27
a5-a4=15=d4
a4-a3=7=d3
a3-a2=3=d2
a2-a1=1=d1
dn=2^n-1
Add up the above formulas
The results show that an-a1 = D1 + D2 + D3 +... + DN = 2 + 2 ^ 2 +... + 2 ^ N-N = 2 ^ n-1-n
So an = 2 ^ N-N n = 1,2,3

How to measure the diameter of a copper wire?

The copper wire is wound on a round rod with uniform thickness for n turns. The length of the rod with the wire is measured with a scale, m, and the diameter of the copper wire is m / n