How to write 400 words in the composition of unit 4 of grade 4 in the course of Chinese talents? You must write it yourself Thoughts on reading road signs

How to write 400 words in the composition of unit 4 of grade 4 in the course of Chinese talents? You must write it yourself Thoughts on reading road signs

Recently, I read the passage "road sign" and have a lot of thoughts. I was deeply impressed by the sight of Korean children standing in the storm hand in hand
This short article is about the period of resisting US aggression and aiding Korea. On a stormy night, the Chinese volunteers went to a place to carry out their mission. It was dark everywhere. In order to make the volunteers not see the deep valley clearly in the dark night, the Korean children stood there to make a road sign. They also had to do their best to resist the United States Reading here, I can't help being moved by the spirit of Korean children
When I read that "they are all in high spirits, standing there hand in hand" and "the heavy rain drenched the children's clothes" are also going to do their best to resist U.S. aggression and aid Korea, the Korean children's lofty spirit of thinking for the volunteer army everywhere, their noble spirit of sacrificing themselves for others, and the glorious image of standing in the storm emerge in front of me again
For the safety of the volunteer uncle, they are not afraid of the storm and stand firmly in the storm to make a road sign for the volunteer army. This spirit of self sacrifice is worth learning! I also found the shadow of Korean children among my companions. She is my good friend Xiaoqi. Once I came home and found that my homework was gone, as anxious as an ant on a hot pot, At this time, Xiaoqi suddenly came to my home and returned the exercise book to me. It turned out that I was in a hurry after school and left the exercise book under the desk drawer. Xiaoqi picked up my exercise book while sweeping the floor, and sacrificed her time to send it to my home. I'm really grateful. Compared with her, I'm really ashamed, because I'm a selfish person, After reading the passage "road sign", I decided to be a considerate and selfless person
"Think for others everywhere, sacrifice oneself for others" is my biggest enlightenment after reading "road sign". The Korean children in this article are like a beacon to illuminate the road ahead of me, encouraging me to be a person who thinks for others everywhere

Fourth grade volume I Chinese talent course answers fast

Shrouded, across the river, mist

The volume of a cube is 60 cubic decimeters. What are the lengths of its edges? We need to calculate and explain them

According to the cube volume formula, a ^ 3 = V (a is the edge length), so a = 60 under the third root sign, which is about equal to 3.91487

Why is the product of external terms of proportion equal to the product of internal terms

Because if a: B = C: D, that is a / b = C / d
Then multiply both sides of the equation by BD to get ad = BC, which is the so-called "the product of external terms equals the product of internal terms"

As shown in the figure, it is known that ray ox and ray oy are perpendicular to each other, B and a are the moving points on ox and oy respectively, and bisectors of ∠ ABX and ∠ Bay intersect at C. Q: during the movement of B and a on ox and oy, does the degree of ∠ C change? If not, calculate the value; if not, explain the reason

The bisectors of ∵ ABN and ∵ BAM intersect at C, ∵ C = 180 ° - (∵ 1 + ∵ 2) = 180 ° - 12 (∵ ABN + ∵ BAM) = 180 ° - 12 (∵ O + ∵ OAB + ∵ BAM) = 90 ° - 12 ∵ o = 45 °

Finding the maximum and minimum of a group of numbers satisfying multiple conditions in Excel table
In Sheet1, there is a set of numbers as follows:
A B C D E F G
1 class 1000
21751000
3 1 65 96
4 2 87 85
5 2 95 96
6 1 75 85
7 2 85 63 class
8 1 75 51 1
9 2 65 65 2
Note: the 1000 of Chinese reference person is in cell F1, and the 1000 of mathematics reference person is in cell F2. The reference person is a numerical value calculated by function. Enter the function in cell F8 to get the highest Chinese score of class 1, and the lowest Chinese score of class 1 in cell G9. (count the scores of B2 to B1001, 1001 = cell F1 + 1),
1-2-34-5-6-7-8-9 is the line number, class 1 and class 2, in column a, and language score in column B

The highest score of Chinese
=MAX(IF(INDIRECT("A2:A"&F1+1)=E8,INDIRECT("B2:B"&F1+1)))
Array formula, need to press three keys, otherwise invalid
E8 is the class
According to the above, the lowest score, and another class, you should be able to calculate

Definition operation: for any two rational numbers a and B, if a * b = (A-1) (B + 1), then the value of - 3 * 4 is ()
A. 12B. -12C. 20D. -20

∵ * b = (A-1) (B + 1), ∵ - 3 * 4 = (- 3-1) (4 + 1) = (- 4) × 5 = - 20, so D

There are 120 peach trees in the orchard. The pear tree is 20% more than the peach tree, and the apple tree is 15% less than the peach tree?
Give the formula

Pear trees = 120 × (1 + 20%) = 144
Apple trees = 120 × (1-25%) = 90

If ︱ A-3 ︱ + (6 + b) Λ2 + √ C + 2 = 0, find the value of a in the algebraic formula b-c

∵｜a-3｜＋（6+b）∧2+√c+2＝0
∴ a-3=0 6+b=0 c+2=0
a=3 b=-6 c=-2
(B-C) a = 3 / (- 6 + 2) = - 3 / 4

Sunshine primary school has 750 boys, one fourth more than girls. How many students are there in the school?
For a 50ml bottle of beverage, Xiao Li drank 1 / 5 of it for the first time and 1 / 4 of it for the second time. How much did he drink in total?

1. A total of = 750 (1-1 / 4) + 750 = 1750 people
2. Total = 50 × 1 / 5 + 50 × (1-1 / 5) × 1 / 4 = 20ml
Do not understand can ask, help please adopt, thank you!