Is 2100 a leap year? We have tried, from 2008 to 2100, why is the year that can be divided by 100 but not by 400 not a leap year? 2100 is not a leap year, 2099, 2098, 2101 and 2102 are not leap years. Isn't this unreasonable? (is this scientific truth)

Is 2100 a leap year? We have tried, from 2008 to 2100, why is the year that can be divided by 100 but not by 400 not a leap year? 2100 is not a leap year, 2099, 2098, 2101 and 2102 are not leap years. Isn't this unreasonable? (is this scientific truth)

On the Gregorian calendar leap year is such a provision: the earth revolves around the sun is called a regression year, a regression year 365 days older 5:48:46 seconds

(- 47.65) x2 6 / 11 + (- 37.15) x (- 2 6 / 11) + 10.5x (- 7 5 / 11)

(- 47.65) x2 6 / 11 + (- 37.15) x (- 2 6 / 11) + 10.5x (- 7 5 / 11)
=(- 47.65 + 37.15) x2 6 / 11 + 10.5x (- 7 5 / 11)
=-10.5x2 and 6 / 11 + 10.5x (- 7 and 5 / 11)
=-10.5x (2 + 6 / 11 + 7 + 5 / 11)
=-10.5x10
=-105

There are only three story books and five undergraduate teaching books in the bookcase. How many books should we take out at least to ensure that we take out two identical books at a time?

2 + 1 = 3 A: make sure to take out two identical books at a time, at least 3 books

English translation
The other side's problem is
Why you are interested in our products when in China all of them sell copies
Please translate the following Chinese into English,
Our company's customers are those who have high requirements for the quality of products or are only willing to buy original products. They are very disgusted with imitations, and I think there will be more and more such customers, so I want to be the distributor of your products

The customers of our company have a higher requirement for the quality of the products and they are only willing to buy original products,They hate the copies very much and I think there will be more ...

35.26 degrees are expressed in degrees, minutes and seconds

35.26°
= 35°15'36"

A sealed cuboid glass jar with a small amount of water is 10 cm long, 6 cm wide and 5 cm high
Put different sides of the glass jar as the bottom on the table. The bottom height of the water surface is 2 cm, and how many cm is the highest height of the water surface?

If the bottom height is 10 * 6, the water volume is 120
If the highest height is 5 * 6, the water surface is 120 / 30 = 4cm

It is known that the common ratio of {an} is Q, the sum of the first n terms is Sn, and S3, S9 and S6 are arithmetic sequences
Proving that A2, a8 and A5 are equal ratio sequence

Because s3.s9.s6 is an arithmetic sequence 2s9 = S3 + S6 2A1 (1-Q ^ 8) / (1-Q) = A1 (1-Q ^ 2) / (1-Q) + A1 (1-Q ^ 5) / (1-Q) 2 (1-Q ^ 8) = 2-Q ^ 2-Q ^ 5 2q ^ 8 = q ^ 2 + Q ^ 5 2q ^ 7 = q + Q ^ 4 2a1q ^ 7 = a1q + a1q ^ 4 2a8 = A2 + A5, a2.a8.a5 is an arithmetic sequence

The circumference of a rectangle is 20 decimeters, and its width is 2 / 3 of its length. How many square decimeters is its area

20÷2=10
Width 10 ÷ (3 + 2) × 2 = 4 decimeters
Length 10 △ 5 × 3 = 6 decimeters
Area 4 × 6 = 24 decimeters and 178;

Separated by punctuation, it can be divided into two situations, which make the two sentences have different meanings
Anything, if the two sentences are the same

Do you agree? No
Do you agree or not?
Do you agree? Yes
Teachers, students can not find Li Qiang, very anxious
Teachers, students can not find Li Qiang, very anxious
Li Qiang was very worried because his teacher and classmates couldn't find the way
Li Qiang was worried because his teacher and classmates couldn't find the way
The pig is as big as a mountain, the mouse is dead, the wine jar is good, the vinegar jar is sour
A pig is as big as a mouse, and its head is dead

Who gave me an excellent composition of less than 1000 words

My feel
Blue sky is willing to be a winged bird, gently, let me gaze deeply for the last time. You, no longer belong to melancholy
——Inscription
You, with the symbol of love, are full of the haze of the sky. The cloud is your partner. Now, with your deepest dance, you will be gorgeous again for a long time
Have not bloomed smile it! I, bless you. Deeply bless you. Gently, go, I let you go, where there is no confidant, the end of the world if neighbors
In that world, I know that you are my hope, even my long lost smile,
It belongs to you
Allow me to hug you once, OK? Just once, I know, this is the first time and the last time. The eternal promise is a lie
In your ear, I want to say, blue sky, what a yearning name. Don't let it down. The spirit of all things is so beautiful
It's so mysterious that one can take the place of cloud to master your happiness, anger, sadness and happiness, but my idea is wrong. You belong to everyone
The cloud, instead of us, accompany you. You, no longer lonely. Look, that's me, beside you. Singing "sky" for you, there
In the light voice, I miss you deeply and the way you smile at me I have never forgotten that promise
Afternoon leisure time can always think of your shadow. Holding the love of coffee, quietly watching, watching your hazy eyes. Look, that
It's It's not you. Where's your smile? I know it's hard for you. I hope you can forgive us. What we've done
It's not intentional. The most innocent smile, I don't hope, but I really want to appreciate it again, just once! You, will you
Do you agree? Tasting coffee, no milk mellow. Carefully sucking, looking forward to the familiar taste. Unfortunately, I have no feeling
Feel the joy of comfort
What I feel in the palm of my hand is that you moisten me gently. The palm of my hand and the back of my hand are so beautiful. I used to play with you with stone scissors and cloth, you know
Remember? You lost, you said to punish a smile, but you broke faith, you did not give me a smile. You I cry. Why do you cry? I don't know
I don't know, tears full of temperature, but it's cold. Ticking, lying on my shoulder. Hate your hypocrisy, are you hypocritical
Then, why is the world not? Answer me, you are silent, I know you are really tired
Blue sky, I like you, the feeling of staring at you, the feeling of seeing you, the feeling of listening to you breathing, the feeling of gently taking a breath of fresh air
Huan sunset, looking at your shy face, deep blush, how beautiful ah, you, the most beautiful bride! Most like to listen to you to me
Say, can't give up, oh, I cheer for you. Every time, that kind of heart has the feeling, let me feel, you to my expectation. I know
Tao, with your encouragement, I will not give up! Even if I know I will not succeed, but even if it is a glimmer, one percent of the hope of success
I, firmly, definitely, definitely, will not give up, believe me!
Every time I feel sad, I really feel a great sense of fear. Your deep eyes often give me a feeling of helplessness,
Don't look at me any more. Is it me? Did I do something wrong? After reflection, I can get the real answer I expect, and you will tell me
Yes, right? You can never be expected. Every time, you will think that if you can speak, when I am disappointed and when I fail, you will be happy
Will you really comfort me like a bosom friend? I think, right? Haven't you always been my most trusted friend? You, my most trusted friend
If, one day, I lose the light, will you let me see the light?
Every day, lie in front of the window, hold it. Think, think, I see you, you smile to me, I see you, you are really childish
But I just like your naughty. Hide, hide, let me come to you, right? OK, pull hook Oh, found, you want to sing a song for me
I didn't find you OK, you come out, I give up. But you didn't come out. It's raining again. Why, every day
When I am full of hope, you have to give me a heavy blow?
Perhaps, the word "complaining" is more profound in my eyes. The blue sky seems lifeless, but it carries the lives of all people,
Which day, when the sky is no longer bright, no longer appear, how terrible. I will always be on the road, looking for you, do not let you leave us
Remember, I will find the lost beauty one day
The day of meditation has not come. Even if I exchange a thousand wishes with you, I know that you will not promise me just one wish
Hope. You know what I want. Empty, still so blue, still unchanged, still spotless, 13 years, everything
All the sun, moon and stars are changing, only you have not changed. Looking at yourself growing up day by day, looking at the disillusionment of your wishes day by day, can you
Do you know my mood? It's like you cry. What I want is not your tears, even your tears are sweet
The blue sky is flawless. Happy every day, every time, how I wish I had a pair of wings, willing to fly with you,
In this way, I can have no worries, and what I have is carefree happiness. The embodiment of freedom does not make me happy, but takes away
My happiness
You have been enlightening me, every time I feel no support, I am eager to get your support, and your inspiration is not open
Lead me. I'm really sad, no one understands me, those right and wrong already tired. I, turned away, you will be sad? Maybe
I do not understand you, in fact, you have been helping me, in this rough road, your ups and downs on behalf of my ups and downs
You really know me
For so many years, that feeling seems to have been stored in the heart, it is a hazy seed, has not blossomed before, has been buried
It's very deep. It's always pinned on high hopes. I've never thought about your feelings. In fact, it's always suggestive to me that, in fact, you're the best
Always accompany me through the muddy path, in fact, you care about my words. Blue sky, always want to know your secret, because,
Your promise to me has not come true yet
my feel,my happy feel,it is always with me.bue i can‘t feel.why? i want to know.answer me
please.you will cheer me ? right! you can‘t leave me. you told me you will find the
happiness with me! but you ,you left me……
Listen to your heart beat
Jumping without rules
I'm thinking quietly
I don't want to be disturbed
We hugged each other
But let it go easily
It's a subtle feeling
What should I say
Time is divided into diagonals
Stop being nice to me
Break down our dependence
The sky after you leave
I look for a dream like a kite
Sky after rain
Is there a face after clearing up
I look at the sky quietly
Try to find the feeling of loss
Just smile
Looking forward to the rainbow after the rain
Listen to your heart beat
Jumping without rules
I'm thinking quietly
I don't want to be disturbed
We hugged each other
But let it go easily
It's a subtle feeling
What should I say
Time is divided into diagonals
Stop being nice to me
Break down our dependence
The sky after you leave
I look for a dream like a kite
Sky after rain
Is there a face after clearing up
I look at the sky quietly
Try to find the feeling of loss
Just smile
Looking forward to the rainbow after the rain
oh～～～
The sky after you leave
I look for a dream like a kite
Sky after rain
Is there a face after clearing up
I look at the sky quietly
Try to find the feeling of loss
Just smile
Looking forward to the rainbow after the rain
The sky after you leave
I look for a dream like a kite
I look at the sky quietly
Try to find the feeling of loss
Wish, I know, will always be