Sixth grade volume two Chinese unit 1 exercises, borrow material metaphor article, 500 words In the end, we should have our own enlightenment, which is similar to mahogany. It's urgent,

On the table in front of the blackboard, there are many pieces of chalk. These chalk are almost to the end of life, and even some small ones are not worth mentioning. Ding Ling, the bell of class rings, and the students run to the seats quickly, straighten their chests, waiting for the teacher's arrival. The teacher strides in and puts the documents on the table, The teacher picked up a piece of chalk that he could just hold and turned around to write for us from the blackboard. Shashasha, Shasha, the chalk turned into white granular objects. After leaving his own trace on the blackboard, it disappeared a little bit. "Borrowing things to describe people and expressing aspirations through objects." when this small piece of chalk wrote the last word for us, Teach us the last knowledge. After finishing its last task, it disappears. What a great quality is embodied in this small piece of chalk. That is dedication
"Squeak Squeak... " The chalk is moving on the blackboard. Gradually, it becomes a point. A small body is gone. Instead of it, there are lines of words on the blackboard. The lines of words take us to travel in the mysterious world of knowledge, and let us set sail for our ideals
When cleaning the blackboard, the chalk stands by silently, letting the eraser gently wipe to the blackboard, erasing the lines of writing it wrote with its body. Countless fine pieces of chalk slowly fall down, like the rustling of jade chips, like snowflakes But I think it's more like a spirit, a spirit of silent dedication, and more like noble people. These are the teachers who work hard to cultivate the flowers of the motherland. Teachers, they have worked hard to cultivate the flowers of the motherland generation after generation. They have worked hard from spring to autumn, from green silk to white temples, with meager wages, But never a word of complaint; let the students step on their shoulders to the throne of success; accept flowers, applause and trophies, but never proud. Isn't this just like the selfless spirit of chalk? I praise chalk, but also praise the people with the spirit of chalk - because they selflessly sacrifice themselves for the society regardless of personal gain and loss, and do not strive for fame and gain!

Ask for the second composition of the sixth grade Chinese Volume II of Jiangsu Education Press

Composition of exercise 4 in Volume 2 of grade 6 of Jiangsu Education Press

An interesting experiment "Ouch!" I turned off the computer and came out. I found that there were several pieces of sponge and several boxes on the dining table. My mother came out and said, "today, I will do this small experiment with these things!" I looked at the sponge and the boxes and asked, "can we do this small experiment with four pieces of sponge and two boxes?"

Hyperbolic equation is x ^ 2-y ^ 2 / 2 = 1, ask if there is a chord bisected by point B (1,1), if so, find out the equation of the chord

Note: (1) - (2) get: (x1 + x2) (x1-x2) + (Y1 + Y2) (y1-y2) / 2 = 1, that is, 2 (x1-x2) + 2 (y1-y2) / 2 = 0, here is wrong, the first line = 1 should be wrong, but that formula is also wrong, it should be 2 (x1-x2) + 2 (y2-y1) / 2 = 0, so (y1-y2) / (x1-x2) = 2, the linear equation is y = 2

How much current can four square wires bear

The current has skin effect. The current of multi strand wire is larger than that of single strand wire
The resistance of aluminum wire is larger than that of copper wire, and the current carried by aluminum wire is smaller than that of copper wire
Aluminum wire can carry 4 a per square millimeter, copper wire can carry 10 a per square millimeter
A 4mm2 aluminum wire can carry about 16a and a 4mm2 copper wire can carry about 40A

7(a-1)+x(a-1),3（a-b）²+6（b-a）,2（m-n）²-m（m-n）,x（x-y）²-y（y-x）²,
I don't want to just ask for the answer m (A & # 178; + B & # 178;) + n (A & # 178; + B & # 178;)

7(a-1)+x(a-1)=(7+x)(a-1)3(a-b)²+6(a-b)=(a-b)(3(a-b)+6)=(a-b)(3a-3b+6)2(m-n)²-m(m-n)=(m-n)(2(m-n)-m)=(m-n)(2m-2n-m)=(m-n)(m-2n)x(x-y)²-y(y-x)²=x(x-y)²-y(x-y)²=(x-y)²(...

How much electricity does a 2-watt appliance run 24 hours a day
It's on 24 hours a day. How many kilowatts a day? It's too small. Or tell me how many kilowatts a month

1 kwh = 1000 W · H
Now it uses 48 watt hours a day and 1440 watt hours a month for 30 days

If there are four balloons, two red ones and two blue ones, what's the probability that they are the same

The probability of two blues is the same as that of two Reds
First calculate the probability of blue, and then multiply by 2 to get the same probability
Blue probability:
The probability that the first time is blue is 2 / 4
The second time or blue probability is 1 / 3
What we get is that the probability of two blues is 2 / 4 times 1 / 3 equals 1 / 6
The probability of taking out two red is also 1 / 6
The probability of the same color is 1 / 3

Two 100W and 40W bulbs are connected in a 220 V circuit. How many amperes is the total current of the circuit?

Parallel 40 / 220 = 0.182
100/220=0.455
Total current 0.182 + 0.455 = 0.637
Series 220 V / 0.182 = 1208.8 Ω
220 / 0.455 = 483.52 Ω
Total resistance 1208.8 + 483.52 = 1692.32
Series current: 220 / 1692.32 = 0.13a

Simple operation of 14 / 15 × (5 / 14 5 / 21) 2 / 3

=14/15×5/14+14/15×5/21+2/3
=1/3+2/9+2/3
=(1/3+2/3)+2/9
=1+2/9
=1 and 2 / 9

Sixth grade volume two Chinese unit 1 exercises, borrow material metaphor article, 500 words In the end, we should have our own enlightenment, which is similar to mahogany. It's urgent,