Please ask everyone, thank you 15

Just like it, I'm still young, whether there is a result or not, it's good to leave some memories for yourself.

Two people are a little embarrassed at the beginning of falling in love, for fear of leaving a bad influence on each other, they all show the good, the girl has talked twice before, maybe she has a good impression of you, so take the initiative, you are not at ease with her, it is normal, you can date for a period of time to see, you think that two people can talk very well, just continue, really not, just break up.

It is very necessary to learn more about it first, because understanding each other will give you confidence, and it is also responsible for both parties, after all, you are a former couple to develop, don't wait until you can't extricate yourself and then regret it, although online dating, but online dating will also have true feelings, you have already met, and it is also a date, as long as you feel good about her impression, then you might as well try to contact and try, maybe she is really the one who accompanies you through the second half of your life. To be worthy of yourself and worthy of her, don't be an irresponsible person, and don't wait until you lose to know that you regret it, knowing more about it will be good for both of you, this is not child's play, as long as you have feelings for her, and she is equally satisfied with you, then don't procrastinate, just let your heart tell you the final decision.

Since you don't dislike girls, and you don't hate them, you might as well go first. If it's really not suitable, it's not too late to break up, if you break up when you're still hesitant, and you end up feeling a little liked, then going back may not be able to save the relationship.

If you have feelings for her, it's suitable to get along with, and if you don't like it, just reject it. It seems that when a woman takes the initiative, most men do not refuse to come.

B has a velocity of x, and A has a velocity of 2x;

100 (2x-x) = 900 (A runs one more lap than B) x = 92x = 18

Then the velocity of A is 18m s, and the velocity of B is 9m s

A total of 100s of races, the first encounter means that A ran one more lap than B, that is, A ran 900m more than B

The armor is 2x m s

B is x m s

the distance of A; is 2x 100 = 200x m

B's distance is x 100 = 100x m

then (200-100) x = 900

The solution is x=900 100=9 m s

A is 9 m s

B is 18 m s

Let the velocity of B be v

2v*100-v*100=900

v = 9 A speed 18

Premise: I calculated the 200-meter runway with the inner ring line as 200 meters. But I don't know if the regular runway is calculated as 200 meters in the inner circle, this is just an inference, if not, it will not run 200 meters if it is not the inner track.

1. Solve the radius of the inner curve:

The sum of the lengths of the two curves in a semicircular track field is exactly equal to the circumference of a circle. The total length of the runway is 200 meters, and the straight is 50 meters, then the total length of the straight on both sides is 50*2=100 meters, so the total length of the two semicircles is 100 meters. Then the radius of the inner protrusion is .

c=2 (pi)r, 100=2*, and r1=m. That is, the corresponding radius of the curve section of the first lane is.

2. The width of each road can be pushed:

The corresponding radius of the second curve section r2 = meters The length of the second curve is reversed.

The corresponding radius of the third curve section r3 = m The length of the third curve is reversed.

The corresponding radius of the fourth curve section r4 = meters The length of the fourth curve is reversed.

Interlude: If it is calculated according to the center line of the runway, then it is necessary to add the radius of each lane, but the relative error between them is not large.

3. The difference is to find the relative straight gap between the starts.

The difference between the first and fourth lanes:

If the other data is needed above, the reduction calculation is out.

4. The method should be correct, but there should be more accurate scientific measurement. Mainly not familiar with the runway specifications, but based on the data you provide... There is generally empirical data.

ln=cn-c1

2π[r+(n-1)d+

2π[(n-1)

n is the number of runway tracks (take 4), d is the runway spacing (take, substitute to find the meter. Well, this one is more accurate.

Analysis: The straights of the four tracks on the loop are equal, with the difference being a semi-circular track. Two semicircles, together they are a circle. The fourth lane is 3 meters away from the first. That is, the radius of the circular part of the two is different by meters. Then the difference in their length is: (m).

Romantic poet Li Bai, realist poet Du Fu, Bai Juyi.

These three poets are respectively revered as poets, poets and poets Liu Yuxi are called "poets", and Meng Jiao and Jia Dao are called "poets".

"Ci" is a kind of poetry, also known as (Quzi Ci), (Yuefu), (movement) and (long and short sentences), etc., which began in (Tang), was stereotyped in (Five Dynasties), and prevailed in (Song). Each word has a tune name that represents **, which is called (word plate). Although it has nothing to do with the content, it plays the role of "three determinations", namely the number of words (the number of words), the number of words and the number of sentences (the number of sentences).

According to the number of sentences and the number of words, it can be issued as (small order), (middle tone) and (long tone). Song Ci has a school of euphemistic words represented by (Liu Yong) and (Li Qingzhao) and a school of bold words represented by (Xin Qiji) and (Su Shi).

As for Sanding, because he didn't study very well, he didn't know if he wrote it correctly, I think it should be good,。。