Please help me find the content in this book! 40

Green ant new brew wine, red clay small stove. If you want snow in the evening, can you drink a glass of nothing?

There is a confidant in the sea, and the end of the world is like a neighbor. Inaction is on the wrong path, and the children are stained with scarves.

The husband was not proud, and he walked and lowered his eyebrows. Suqin plays again, and there will be bosom friends.

The friendship between cloth and clothes cannot be forgotten.

The gentleman and the gentleman are friends with the same way, and the villain and the villain are friends with the same benefit.

Two sentences and three years, a groan and two tears.

If the bosom friend is not appreciated, return to the old mountain and autumn.

What to do with the loneliness, and return to the sky.

If you want to find fragrant grass, you will go against the old people.

When the road is fake, the bosom friend is rare.

should only guard the loneliness and cover the old garden.

There is a confidant in the sea, and the end of the world is like an age. Within the four seas, all brothers are also.

It is easy to get 10,000 taels, and it is difficult to find a confidant.

Acquaintances are all over the world, and there are a few people who know each other.

Yang Yi didn't meet, and he felt sorry for Lingyun; When the clock is met, why is it ashamed to play the flowing water?

Zhong Zi died, and Boya did not touch the drum and piano for life.

It is enough to know one life, and the world should look at it with the same heart.

If the bosom friend is not appreciated, return to the old mountain and autumn.

The five tones on the seven strings are cold, and this art bosom friend has been difficult since ancient times.

Mountains and rivers look for bosom friends and acquaintances all over the world, and a few people can raise their hearts and regret themselves; The bell period is encountered, and the flowing water seems to be ashamed, the bell period is dead, and Boya does not touch the drum and piano for life.

There are fewer than a thousand cups of wine for a confidant, and there is no speculation for more than half a sentence.

It is easy to get 10,000 taels, and it is difficult to find a confidant.

Get a confidant, no regrets for life.

Apples are 10, 4 bananas are 4 1, bananas are 12, coconuts are 2 1, and coconuts are 1

To sum up, the answer is 14 to adopt.

Apples are 10, bananas are 4, and the other is: 2

1. Solve the end-of-circuit voltage, that is, the voltage of the external circuit excluding the power supply part.

Solution: Set the terminal voltage to be U, the dry current to be I, the equivalent resistance of the external circuit to be R, the power supply electromotive force E=12V, and the internal resistance to R=2, then:

r=(5+15)//(5+15)=10ω

i=12/(10+2)=1a

From the formula u=e-ir, the end-of-circuit voltage: can be obtained

u=12-(1×2)=10v

2. Solve the total power of the power supply, after analysis, the voltage of the power supply is the electromotive force of the power supply is 12V, and the current has been calculated as 1A, according to the power formula P=UI (note: this U is not the U above), you can get:

p=ui=12×1=12w

The total power of the power supply is 12W

3. To solve the voltage between a and b, after analysis, only the potential of the two points of a and b is required, and the left end of the resistance of 5 and 15 is connected to the 0 potential of the power supply, so the voltage of 5 and 15 is the potential of the two points of a and b, then:

Potential ua= 10=

Potential UB = 10=

then uab=ua-ub=

The voltage at both ends of A and B is 5V, and the reverse is opposite to the actual voltage direction.

Note: 10V is equal to the terminal voltage, because it is a parallel relationship.

4. Solve the total current of the circuit, when A and B are connected, then 5 and 15 are found to be connected in parallel, and then connected in series, and the equivalent resistance is Ro, then:

ro=(5//15)+(15//5)=(75/20)+(75/20)

then the total current io=12 (

The total current is.

The answer is AC. First of all, the sum of the two sets of parallel resistors is 10 ohms, the series plus internal resistance is 2 ohms for a total of 12 ohms, and the current is 1 amperere, so the parallel terminal voltage is 10 volts. Secondly, point A, point B, the difference is the voltage of 5 volts.

The first question is tangential.。。

Let the straight line be y=kx+b through the point (0,1) to find b=1.

Then y=kx+1

Then the center of the circle is (2,3).

The distance from the center of the circle to the straight line y=kx+1 is equal to the radius of 1, and the distance from the point to the straight line is a range of 2 k values.

Is it okay to have time to help you do it at night?

In the first question, you can draw a graph to find the value of k, and you can see it intuitively.

The nutrients of the soil moistened by the spring rain will be 10 to 20 times higher than the normal one, so it will be like this.