It's an interesting animal,it has a long neck,it's a g( ) . Sonetimes to be a police officer is exciting but d( ). My father is busy every day,I think ha needs a v( ) to have a rest. Do you like to work for a m( ) as a reporter? October 1st is our N( ) Day.

Giraffe is an interesting animal. It has a long neck
Being a policeman is an exciting career, but it's full of danger
My father is busy every day. I think he needs a holiday to relax
October 1st is our national day
I'm not sure about the penultimate. Maybe it's medium

1. If a is greater than or equal to 2, then | A-2 | = ()
2. If the product of four unequal integers a, B, C and D equals 25, then a + B + C + D = ()
3. It is known that the absolute value of the number a is twice that of the number B, and the points of the two numbers on the number axis are on both sides of the origin, and the distance between the two points is 6. If the points of the two numbers on the number axis are on the same side of the origin, what are the two numbers?
4. When someone goes out at 7:00 p.m., the angle between the minute hand and the hour hand on his watch is just 110 degrees. When he goes home before 8:00 p.m., the angle between the two hands on his watch is still 110 degrees. How long has he been out?
5. Calculate 24 points: 3,4, - 6,10. Add, subtract, multiply and divide to get 24. The formula is ()
6. Given that n is a positive integer, M = - 4 / 1 - [(- 1) nth power], and | m + n | = 3, find the value of | M-N | - | 3M + n | - 2 | - M | + 3 | - 2n |
7. There are nine electric lights in the classroom, and each light has a pull switch. At first, the nine lights are all off. If you pull six of them once each time, how about: (1) after several times, can you turn on all the nine lights? If you can, give a solution; if you can't, please explain the reason. (2) if there are eight lights in the classroom, pull seven of them once each time, what's the situation?
7. A car runs 45 minutes uphill and 30 minutes downhill, with an average driving time of 1.5 hours. It is known that the driving speed on the level road is a km / h, the uphill speed is B km / h slower than that on the level road, and the downhill speed is C km / h faster than that on the level road. How many km does the car travel?
8. It is known that the | 2a-1 | power y of 2x and the | B | power of - 1 / 2XY are similar terms, and a and B are negative reciprocal each other. The value of ab-3 (A / 2-B) - A / 2 + 5 is obtained
9. If AC = 7.2 and BC = 3.8, the distance between the midpoint of AC and BC is calculated

1. A-22.03.2 and - 4 or 4 and - 2, 6 and 124. It takes 12 hours to walk a circle (360 degrees) clockwise, that is, the speed is 360 degrees / 12 hours = 360 degrees / (12 * 60) minutes = 0.5 degrees / minutes, and it takes 1 hour to walk a circle (360 degrees) minute hand, that is, the speed is 360 degrees / 1 hour = 360 degrees / 60 minutes = 6 degrees / minutes

how will you （）these rubbish
A.do with B.do without C.deal with D.deal without
he often hurt his parents （）angry all the time
A.with be B.with being C.by to be D.by being
i didn't pass the math exam last time .
=i （）（） pass the math exam last time

1. Deal with C
2. With By, followed by doing, choose D
3. Fail to do Failed to

Pure resistance and impure resistance formula
Which formulas are pure resistance circuit formulas and which formulas are non pure resistance circuit formulas?
Which formula can be used for pure resistance circuit formula and which formula can be used for non pure resistance circuit formula?

Ohm's Law (I = u / R) is available only in pure resistors
Joule's Law (q = I ^ 2rt) makes everything work
So the things inverted by Ohm's law are not available in non pure resistance circuit, such as q = u ^ 2 / R
But the total power of the circuit (including heating and other energy) w = UI is certainly available
Just understand w = q + E

Let f (x) be a monotone decreasing function on [0,1], and try to prove that for any Q belonging to [0,1], there is an inequality ∫ Q / 0 f (x) DX ≥ Q ∫ 1 / 0f (x) DX to get a detailed solution

∫q/0 f(x)dx=∫1/0 f(qx)dqx=q∫1/0 f(qx)dx
F (x) is a monotone decreasing function on [0,1], so for any Q, it belongs to [0,1],
If 0 ≤ QX ≤ x ≤ 1, f (QX) ≥ f (x)
∫1/0 f(qx)dx≥∫1/0f(x)dx

Square area formula
A square pool has a tree at the four corners of the square. Now we need to expand the pool. After expansion, the shape of the pool is still square, but the area is twice the original. Can we do it without moving four trees
Give me a formula?

a*fg*jhj
Answer: it's classical Chinese - level one 2010-4-27 20:14
I can't, because the square difference of all numbers is different
Respondent: Yi GI - level 4 20:15, April 27, 2010
sure
After expansion, the shape of the pool is still square, but the area is twice the original
The side length of the expanded pool is √ 2 times of the original side length
Four trees are at the midpoint of the four sides of the enlarged pool
The distance between every two trees is the side length of the original square pool = a
Side length of expanded pool = 2 × A / √ 2 = √ 2A
Interviewer: the king of the sky - CET-6 20:16, April 27, 2010
Make the four trees into the midpoint of the four sides of a large square
Respondent: gshbao - level 9 20:16 APR 27 2010
Absolutely!
This There seems to be no formula
Respondent: 115.208.127
Yes, make a diagonal vertical line for each corner. After intersecting, you will get the figure. Draw and see
Respondent: Ice Blue conch - grade 4 20:18 April 27, 2010
First, make two diagonals of the square, then pass through four vertices to make parallel lines of the diagonals of the vertex, and cross into a new square. The new square meets the requirements
Responder: tmxkongor - first level 2010-4-27 20:18
The problem is very simple. Imagine that your screen is a pool with four trees at four corners. Tilt your head 45 degrees to the right and dig the largest pool in front of you without moving a tree
That is to say, take four trees (points) as the midpoint of the side of the new square
Square area formula = a * a
The key to this problem is where is the side length a? The key is the transformation of thinking
In real life, such a problem does not exist. It is of normal significance to insist on doing so
Respondent: dzb2wx - Level 3 20:19, April 27, 2010
Yes, take four trees as the midpoint of the big square,
Let the side length of a small square be: a
Then the area of the small square is: A ^ 2
The side length of the large square is: √ 2A
The area of the large square is: √ 2A * √ 2A = 2A ^ 2
Respondent: zxqsyr - CET 16 20:19, April 27, 2010
It can be done. The square area formula is s = L & sup2;, assuming that the pool area is 4 m2, then the side length is 2m, and four trees are four vertices. Now turn the four vertices into the midpoint of the expanded square pool, then we can deduce that the side length of the expanded square is 2 √ 2 (√ is the root sign, If the square area is larger than 8, it can't be done. If the square area is smaller than 8, it can be done. This problem is just equal to the calculation of 8 provinces. This problem can be drawn without formula. If there is no drawing software, it won't help to draw. Give points, hehe

Two positive integers with the sum of 48, the sum of the cube of the first number and the square of the second number is the smallest, then what are the two positive integers
Operation of derivative

y=x^3+(48-x)^2
y'=3x^2-2(48-x)
Let y '= 0
3x^2+2x-96=0
(3x-16)(x+6)=0
X = 16 / 3 or x = - 6
The function y is a decreasing function at (0,16 / 3) and an increasing function at (16 / 3, + infinity)
Since x is a positive integer, the nearest integer of 16 / 3 is x = 5
Another number 48-x = 43
5 and 43

∫0 1 e^x dx
Using the definition of evaluation, find the process, the answer is E-1

∫ 01E ^ x DX = e ^ x 01 = e ^ 1-e ^ 0 = E-1

My hotel has a round table of 1.6 m 1.8 m 2.0 m 2.2 m 2.6 m 3.6 M. what is the size of turntable cloth and skirt?

The diameter of table cloth should be 60 cm more than that of table, the diameter of table skirt should be 1.4 m more than that of table skirt, and the diameter of turntable should be 60 cm less than that of table skirt,

When a 3-meter-long cylinder is sawed into two sections and the surface area is increased by 4 square meters, the volume of the cylinder is?

6 cubic meters

It's an interesting animal,it has a long neck,it's a g( ) . Sonetimes to be a police officer is exciting but d( ). My father is busy every day,I think ha needs a v( ) to have a rest. Do you like to work for a m( ) as a reporter? October 1st is our N( ) Day.