Due to the constant friction and conflict between South Korea and North Korea, the situation in North and Central Asia has become tense The situation in North and Central Asia has become tense due to the constant friction and conflict between South Korea and North Korea. 2. The United States has rejected China's proposal to restart the six-party talks on the Korean Peninsula and held large-scale military exercises with South Korea and Japan respectively. 3. Facing the pressure from the United States, North Korea's attitude is still tough. 4. Is war the only way to solve the Korean Peninsula problem?

Due to the constant friction and conflict between South Korea and North Korea, the situation in North and Central Asia has become tense The situation in North and Central Asia has become tense due to the constant friction and conflict between South Korea and North Korea. 2. The United States has rejected China's proposal to restart the six-party talks on the Korean Peninsula and held large-scale military exercises with South Korea and Japan respectively. 3. Facing the pressure from the United States, North Korea's attitude is still tough. 4. Is war the only way to solve the Korean Peninsula problem?

The abuse of prepositions causes the subject to be incomplete
If there has to be one, it may be the fourth sentence. Change "approach" to "method"
The answer is for reference only

My parents are very concerned about and love me

Improper use of words, change "love" to "love"
Mom and dad care about me very much

Modifying symbols and sentences
When doing math problems, you should check and calculate carefully
As soon as I enter the park, I see beautiful flowers and attractive fragrance

When doing math problems, you should check and calculate carefully
When doing math problems, we should calculate and check carefully
As soon as I enter the park, I see beautiful flowers and attractive fragrance
As soon as I entered the park, I saw the beautiful flowers and smelled the attractive fragrance

The application of encounter problem
The distance between a and B is 294 kilometers. Two cars leave from a and B station at the same time. One car runs 45 kilometers per hour and the other 52 kilometers per hour. After 1.5 hours, how many kilometers is the distance between the two cars? Answer today

294 - (45 + 52) × 1.5 = 148.5km
A: the distance between the two cars is 148.5km

Given the point Q (2,0) and the circle O: x ^ 2 + y ^ 2 = 1 in the rectangular coordinate plane, the ratio of the tangent length from the moving point m to the circle O to the absolute value of MQ is equal to the constant λ (λ > 0)
The trajectory equation of point m shows what curve it represents

Set the coordinate of point m as (x, y)
The radius of circle C is 1, and the coordinate of center C is (0,0)
Make the tangent of circle C through point m, and the tangent point is p
Then | MP | & sup2; = | MC | & sup2; - | CP | & sup2; = x & sup2; + Y & sup2; - 1
Obviously, X & sup2; + Y & sup2; ≥ 1
And | MQ | & sup2; = (X-2) & sup2; + Y & sup2;
∵|MP|/|MQ|=a
∴|MP|=a|MQ|
|MP|²=a²|MQ|²
x²+y²-1=a²[(x-2)²+y²]
x²+y²-1=a²x²-4a²x+4a²+a²y²
(a²-1)x²-4a²x+(a²-1)y²+4a²+1=0
The trajectory equation of point m is: (A & sup2; - 1) x & sup2; - 4A & sup2; X + (A & sup2; - 1) y & sup2; + 4A & sup2; + 1 = 0 (X & sup2; + Y & sup2; ≥ 1)

If one root of the equation x * x + X + a = 0 is greater than one and the other root is less than one, the value range of the real number a can be obtained

Let two be X1 and x2. According to the Weida theorem
x1+x2=-1
x1*x2=a
According to the meaning X1 > 1, X2 < 1
So x1-1 > 0, x2-1 < 0
So (x1-1) (x2-1) < 0
x1x2-（x1+x2）+1＜0
a-(-1)+1＜0
So a < - 2
And △ = 1-4a > 0, that is a < 1 / 4
In conclusion, a ＜ - 2

Land area and total population of Hebei Province

Main data of the sixth national population census of Hebei Province in 2010
Compared with 67436590 in the fifth national population census at 0:00 on November 1, 2000, the number of permanent residents in the province has increased by 4417612, an increase of 6.55%. The average annual growth rate is 0.64%
Hebei Province covers an area of 190000 square kilometers and has a permanent resident population of 71.854202 (Liupu). There are 11 prefecture level administrative divisions (including 11 prefecture level cities) and 172 county-level administrative divisions (including 36 municipal districts, 22 county-level cities, 108 counties and 6 autonomous counties), There are 2227 township level administrative units (including 1 District Office, 266 streets, 1007 towns, 901 townships and 52 ethnic townships). The provincial capital is Shijiazhuang City, and the provincial government is stationed at No. 10 Weiming street

What is Coulomb's law
Formula

Coulomb's Law: the interaction force between two point charges in vacuum is proportional to the product of their electric quantity, inversely proportional to the square of the distance, and the direction is on their line
F=Kq1q2/r²

September 10, 1994 (Saturday) is teacher's day. What day is teacher's day in 2009?

365 days per year, 366 days in 1996, 2000, 2004 and 2008
365=7*52+1
So it's 19 days later
19=2*7+5
Five days from Saturday is Thursday

Seek the application of 10 mathematical knowledge in daily life!
The application of 10 mathematical knowledge in daily life, the best 5 more detailed, each about 400 words, the other five with a stroke can. Enough words to score!

Mathematics
When you buy vegetables, you need to use four arithmetic operations
When you build a house, you have to use geometry
Computer programming may use the program block diagram
You need to use probability when you win
Permutation and combination may be used in personnel allocation
What tables will be used to survey data
There is. A bit unexpected
Really! Isn't there some background pictures on the color pages of each unit in your textbook? You can go there and have a look~