The story of the inventor

The story of the inventor

The Nobel Prize known to all people on earth
In the process of inventing explosives, people thought he was killed. As a result, he climbed out of the ruins and cried, "I made it!"

The story of a persistent scientist or inventor,
Madame Curie, with the exception of Edison and Nobel,
I'm in a hurry. Please do me a favor,

The story of the inventor
I hope you can provide a simple and clear story!
My son and daughter's homework has above, had better write two to come out

1. Edison was diligent, studious, good at thinking and hard-working. At the age of 75, he also went to the laboratory on time every day to check in for work. For decades, he worked for more than ten hours every day, and read for three to five hours in his study at night. If we use the activity time of ordinary people's life to calculate, his life has been doubled, He told people with pride that I was already 135 years old. He lived to 84 years old and made 1100 inventions in his life. His greatest contribution was the invention of phonograph and automatic telegraph, and the experiment and improvement of incandescent lamp and telephone. Edison began to study electric lamp in his early 20 years. It took more than 10 years for him to choose bamboo cotton, graphite, tantalum and so on In 1879, Edison used carbon filament as incandescent filament and ignited it for 40 hours. Due to its porous surface, brittleness and low strength, carbon filament was soon replaced by tungsten filament
2, when Edison invented the phonograph, he had made a breakthrough in the research of electric lamps at the same time after numerous failures. In October 22, 1879, Edison lit the first electric lamp that has wide practical value. In order to prolong the life of the filament, he retested it, and tried to use more than 6000 kinds of fiber materials before finding a new luminous body, Japanese bamboo silk, which lasted for more than 1000 hours. In a way, this invention is the highest achievement of Edison's life

Tom likes() and like().
First blank (optional)
The second blank is sky skiing

Tom likes(skating) and like(skiing).

The three sides of a right triangle are 3 meters, 4 meters and 5 meters respectively. How can the volume of the cone formed by rotation be the largest? Why?

According to the volume calculation formula of cone: SH / 3 (bottom area * height / 3), when the height is 3 meters, the volume is the largest

(final) l adverb (make) present participle (tea bean) plural (turn on) antonym group (two) ordinal (knife) plural
The accusative speed is 2 minutes

final - finally
make-makng
teaspoon - teaspoons
turn on - turn off
two - second
knife-knives
sandwich - sandwiches
meat- meet
they-them

The last step in the proof of cosine theorem of mathematical problem B ^ 2 + C ^ 2-A ^ 2 = 2bccosa how does cosa come from
A ^ 2 = B ^ 2 + C ^ 2-A ^ 2 = 2bccosa senior high school textbook required three 93 page proof questions

We can use the vector of compulsory four to prove it
Let CB = a, CA = B, Ba = C
Then vector a = vector b-vector C
(vector a) ∧ 2 = (vector b-vector C) ∧ 2
=(vector b) Λ2 + (vector C) Λ2-2 vector B · vector C
=b^2+c^2-2bccosA
=a^2
B ^ 2 + C ^ 2-A ^ 2 = 2bccosa can be obtained by moving the term

How does a verb end in y change into ing

Y is preceded by a vowel (a, e, I, O, U) plus ing
The consonant before y changes to I plus ing

On the negative law of philosophical negation
How can the process of capitalist society replacing feudal society go through the negation of negation?

The negation of negation is a description from a macro perspective, a spiral rising process, and a cycle formed by the negation of the latter to the former through repeated repetition. Only by forming a cycle can the integrity of negation of negation be reflected

How to change singular sentence into plural sentence

Change all singular numbers into plural numbers
Person, I / you / he / she / it becomes us / you / them, I / you / he / she / it changes to we / you / they / they / they
As a verb, am / is becomes are, was becomes were, has becomes have, and the others are all changed to verb prototypes
Noun, the singular into the plural, usually followed by S
example:
He is a teacher.
They are teachers.
She sings very well.
They sing very well.