The composition of exercise 5, Volume 2, grade 4, Jiangsu Education Press, 350 words

The composition of exercise 5, Volume 2, grade 4, Jiangsu Education Press, 350 words

How to write the composition of exercise 6 in Volume 2 of grade 4 of Jiangsu Education Press? Any one will do

Wusong fighting tiger and protecting wild animals
Wang Ren read the story of Wu Song's fighting tiger in Outlaws of the marsh and put forward his own opinion. He thought that Wu Song didn't care for wild animals, so Wu Song was not a hero. Was Wu Song a hero when fighting tiger? I held a discussion with my parents with this question
I said discontentedly: "I don't think Wu Song is a hero. As long as he fights wild animals, he is a hero. Are those who fight wild animals also heroes?"
When Wu Song passed Jingyanggang, the tiger had already hurt many people and threatened the safety of the local people. When Wu Song saw the tiger, his life was threatened. Moreover, in the society at that time, the state did not issue a law forbidding the killing of tigers. Wu Song was the first to protect his own safety, Second, it also helped the local people live a peaceful life. So he was praised by the local government. "
After listening to what my mother said, I thought it was reasonable, but I was still unconvinced: "the tiger is so precious. It's a pity to hit it."
His father said with a smile: "Wu Song lived in a time when there were many wild animals. They did not face extinction, and the existence of these animals also affected people's normal life, so his behavior was heroic. But if Wu Song lived in modern times, his behavior could be said not to love wild animals, The light boat has passed the mountains. "Now where can we still hear the sound of an ape and see a bird, we are very happy. Human beings are constantly occupying the territory of animals, making animals fewer and fewer. Now human beings have to reflect on themselves and can't hurt animals for themselves. If the earth has no animals, it's terrible."
After some discussion, I know: in the past, human beings did not have weapons like guns and could not dominate nature. As self-defense, wu song could only fight tigers. Today, in order to protect the ecological balance, we must protect tigers

Is the battery voltaic or voltaic?
Are they one person or another?

Volt, of course, volt
How else would voltage be named after him
Like Joule and watt, all units are named after people

(- 0.75) divided by 5 / 4 divided by (- 0.3) is equal to how much o () ＾) O alas
Now it's time

2

How many joules of heat can be released by burning 1 kg of coal completely? How much mass of water can be heated from 15 ℃ to 45 ℃ by this alcohol

Q coal discharge = MQ = 1 * 3 * 10 ^ 7 = 3 * 10 ^ 7 (J) Q wine discharge = q coal discharge = q water suction m water = q water suction / [C water (t end-t beginning)] = 3 * 10 ^ 7 / [4.2 * 10 ^ 3 (45-15)] about 1kg

1. Cylindrical mold, bottom radius is 5cm, height is 20cm, how many square centimeters of hard paper do you need to make a rectangular box packaging mold?
2. There is a conical sand pile with a bottom radius of 2m, 5M and a sand weight of 3 tons per cubic meter. It needs to be transported by a truck with a load of 10 tons. How many times can it be transported at least?
3. A cylindrical bucket with a bottom radius of 10 cm is filled with water. After a conical plumb with a bottom radius of 5 cm is immersed in the water, the water surface rises by 1 cm. How many cm is the plumb height?

1) The length and width of the cuboid are: 5 * 2 = 10cm, the height is 20cm, s = 10 * 10 * 2 + 20 * 10 * 4 = 900 square cm, 900 square cm of hard paper is needed. 2) v = s * H / 3 = 3.14 * 2 * 2 * 1.5 / 3 = 6.28m3, n = 6.28 * 3 / 10 = 18.84 ≈ 19 times, at least 19 times to transport. 3) volume of rising water = 10 * 10 * 3.14 = 314

What other energy can electricity be converted into
There are also examples of heat energy converting into other energy, mechanical energy converting into other energy, electromagnetic energy Chemical energy Light energy Sound energy
Urgent, urgent, urgent, urgent, this is our sixth grade science lesson 10 basic training problem! And write clearly how these can be transformed into other abilities (process) !

Electric energy can be converted into light energy, heat energy: electric bulb. It can be converted into mechanical energy: electric motor. It can be converted into chemical energy: electrolytic water, etc. it can be converted into sound energy (sound energy can be regarded as mechanical energy): loudspeaker;
Heat energy can be converted into electric energy: hydrothermal power generation. It can be converted into light energy: red iron. It can be converted into chemical energy: Photosynthesis of leaves. It can be converted into electric energy: solar panels. It can be converted into sound energy: the air bursts when heated;
Mechanical energy can be converted into heat energy: electric blanket. It can be converted into electric energy: generator. It can be converted into heat energy: friction generates heat

Factorization: 1-22 + 32-42 + 52-62

1-2²+3²-4²+5²-6²
=(1+2)(1-2)+(3+4)(3-4)+(5+6)(5-6)
=-3-7-11
=-21

How many grams is a cow

N is the unit of force. G is the unit of mass. 1kg * 9.8 = 9.8N

(2 + 1) (2 & # 178; + 1) (4 power of 2 + 1) (8 power of 2 + 1) (16 power of 2 + 1)

(2+1)(2²+1)(2^4+1)(2^8+1)(2^16+1)=(2-1)(2+1)(2²+1)(2^4+1)(2^8+1)(2^16+1)=(2²-1)(2²+1)(2^4+1)(2^8+1)(2^16+1)=(2^4-1)(2^4+1)(2^8+1)(2^16+1)=(2^8-1)(2^8+1)(2^16+1)=(2^16-1)(2^16+1)=2^...