One application body 10, one application body.

What is the volume of a cylinder with a side area of 16 square centimeters and a base diameter equal to its height?

Height: change size 16-4 cm.

Circumference: 4 cm.

Base area: (4 square and 43 157 square centimeters.)

Volume: 1 43 157 4 5 15 157 cubic centimeters.

Let the diameter of the bottom surface be d and the height be d, then the side area of the cylinder is (pai*d)*d=16

then d=4 under the root number PAI

The volume of this cylinder is [pai*(d 2) 2 ]*d = 16 pai under the root number

Upstairs the answer is incomplete, incorrect.

Let the diameter of the bottom surface be d, the radius is r, then the height is d, and r=1 2d side area = bottom circumference * height = (pi * d) * d so pi * d * d = 16, get d = 4 root number pi.

v=16 pi.

16 is the diameter and height of the bottom surface, and then there is the side of the S = CH = 2 Pai Rh = Pi DhThis formula calculates the side area. Finally, find the 2 base areas. Add the side area and the 2 base area to find the area of the cylinder.

The volume is directly divided by the square of d by 4 and then multiplied by the height.

If the diameter of the base surface is d, the radius is r

Side area = bottom circumference * height = (pi * d) * d so pi * d * d = 16

And volume = base area * height = pi * 1 2d * 1 2d = 1 4 pi * d * d = 1 4 * 16 = 4

So v=4

Suppose that the whole journey is x kilometers, then the speed of A is one-fifth x

It can be seen that 3*1/5) +36*3 is equal to x

The solution is equal to 270

That is, 270 kilometers apart.

The A speed is 54 km/h.

The two places are located at a distance of x kilometers.

Then: 3(x 5+36)=x

3x/5+108=x

2/5x=108

x = 270 x 5 = 54 km h

1/5 = 1 divided by 5 = A per hour (full journey.

1) It takes x, y, and z days for A, B, and C to be completed separately.

1/x+1/y=1/6

1/y+1/z=1/10

1/x+1/z=(2/3)/5=2/15

Solution: x=10 (days), y=15 (days), z=30 (days) 2) The daily engineering cost of A and B is 8700 6=1450 yuan, and the daily engineering cost of B and C is 9500 10=950 yuan, and the daily engineering cost of A and C is 5500 5=1100 yuan.

It can be obtained, the daily project cost is: A = 800 yuan, B = 650 yuan, C = 300 yuan to be completed by A, B and C alone, and the total project costs are: A = 8000 yuan, B = 9750 yuan, C = 9000 yuan.

Therefore, in order to save expenses, try to use A to do, if it can be done by an engineering team, all by A to do the most saving, the cost is 8,000 yuan, a total of 10 days.

1.It takes x days, B y days, C z days to make A alone, and the entire engineering quantity is 1, then:

1/x)+(1/y)]*6=1;

1/y)+(1/z)]*10=1;

1/x)+(1/z)]*5=(2/3)

Solve equation: x=10;

y=15;z=30

2. If it is required to be alone for no more than 15 days, only A or B can complete this work alone;

Let A get a dollar, B b yuan, and C yuan a day, then:

a+b=(8700/6)=1450;

b+c=(9500/10)=950;

a+c=(5500/5)=1100;

That is: A and B cooperation get 1450 yuan a day, B and C cooperation get 950 yuan a day, and A and C cooperation get 1100 yuan a day.

Solve equations: a=800, b=650;

If A needs 10 days alone, then the amount of money A needs to do it alone is: 800*10=8000 yuan;

If B needs 15 days alone, then the amount of money B needs to do it alone is: 650*15=9750 yuan.

Therefore, this project is carried out by A alone, and it costs the least money.

"Roaring body" originally originated from Douban's "Jingtao Fellow Friend Group". Because actor Ma Jingtao has always had an exaggerated expression during his performance, and often appears in a posture close to roaring, he must also follow this expression when speaking in this group, and many netizens began to add a series of exclamation points to each sentence. As soon as this expression appeared, it attracted the attention of many netizens.

Many netizens believe that expressing their surprise and anger through a series of exclamation points can relieve the pressure and depression in their hearts. A psychological counselor believes that if the "roaring body" can really become a means for some people to relieve stress and vent, it is not impossible. "But it's a reality that people end up arguing.

He said it wouldn't be a good thing if the venting of the internet made people more and more withdrawn in real life.

1. Contrast between virtual and real.

Use a wide aperture, long focal length, and close range to create a shallow depth of field, blurring the foreground and background, which can effectively highlight the subject. This is also called a weapon for girls by many young photographers, and through my understanding, this is really a technique that almost all girls are obsessed with.

2. Chiaroscuro.

The ** we usually see with chiaroscuro ** is white**, because this better reflects the purity of its tone. Sometimes there are no layers, or even details, giving a tough, minimalist feel. In this way, the subject naturally stands out.

3. Size comparison.

If the size contrast in photography is listed as the subject of the article, it should be an expository essay. The relationship between the two elements in the image is illustrated by the size of the image. For example, when photographing the desert, just photographing the desert can't make people feel its vastness, but with the addition of rows of walking camels in the desert, the desert is really too big.

It's the same with the mountains and the sea.

4. Dynamic and static comparison.

We often use slow speed to shoot water flows, car lights at night, or focus tracking during sports games. There is the beauty of movement and stillness between the virtual and the real, which can fully express the sense of movement and even speed. The picture is naturally no longer rigid, but has a strong visual impact.

5.Warm and cold contrast.

Warm and cold contrast, also known as color contrast. Each of us can feel the temperature of color, the warm morning sun, orange yellow, very warm; The white snow on a snowy night is blue and makes people feel cold. When you come back from the evening shift in the middle of the night, you look up and see that the orange lamp left for you is on in the house, and it is very warm.

Warm and cold can create a sharp contrast, and the theme is immediately revealed. Many masters of photography like to use color to express emotions and attitudes.

The accompaniment is always relative to the subject. With the main body, the accompaniment will be formed. Generally speaking, the accompaniment is recognized because it has some connection with the subject.

And accompaniments often exist independently of the general context or environment, otherwise they would become the background, or environment. It should be known that when words appear alone, their ideographic role is often limited, such as "withered vine". If two words appear in tandem with each other, the effect will immediately develop in breadth and depth, such as adding a "faint crow".

Of course, you can also add, "withered vine", "old tree" shouted fiercely, and "faint crow" were put together, creating a deep artistic conception that is difficult to express in language. The function of the slender companion is to set off with the main body to achieve a delicate description of the theme. Life in its natural state is constantly changing.

The lens can capture any image, and once it is formed in the frame, it will play its role, so what kind of image to capture for me is the basic issue that I need to pay attention to when shooting. Wonderful and rare are of course good. But if it's exciting and rare for a subject to be disruptive, it's better to avoid it, even if you reshoot a different image.

Generally speaking, similar images as companions will play a role in supporting and flattering the meaning of the subject, while the participation of companions with contradictory meanings will greatly broaden the connotation. For example, everyone laughs together and the atmosphere is stronger than laughing alone. But that's all, if the subject laughs and cries with the body, the articles in it are much richer.

Therefore, photographers often use the poor to foil the rich and the weak to foil the bloody war. Similar images tend to appear at the same time because they are in the same field; And capturing different things together requires the wisdom of photographers. Because different things have their own fields, in addition to the "contradiction" you want, other connotations will also be brought over, whether this picture needs these things to be taken seriously.

One thing needs to know: the two fighting are contradictory sides, and of course it is easy to shoot together. But they are in the same scene, two sides of the same thing, and generally I will call this a plot, or a group of images, rather than a subject or a companion, and we will discuss it in the future.

Of course, the accompaniment can be in the same scene as the subject, but the more different their intrinsic meanings, the easier it is to reflect the photographer's expressive ability. It is the creation of the photographer to choose images with different meanings according to a certain theme and reorganize them together by capturing them. If it is only the effect of the existence of both sides of the matter, it is still an objective record, but it is only a momentary record.

It is not possible to say which of these two situations is better and which is not, it depends on the need. Generally speaking, the former is more subjective and more reflective of the photographer's creativity, which is suitable for creative works that enhance the ideological connotation or appeal; The latter is more objective and reflects a more objective narrative, which is more suitable for narrative and corroborative works that need to reflect the characteristics of "objectivity" and "no interference".

Be sure to adopt mine, because I use this baby too.