In spring, the peach blossoms smile and the willows dance in the fields______________ .

In spring, the peach blossoms smile and the willows dance in the fields______________ .

In the fields, rice laughs and seedlings dance

What is spring

What is spring? The birds in the branches rush to say: it is the clear and sweet song before dawn, the fresh air and the warm sunshine
What is spring? The warm wind blowing through the countryside said: the fallen tree trunks are full of new green, and the ice covered pool is rippling
What is spring? The budding flowers and bones say: it is the release of passion of winter reserve and another round of recovery of dormant life
What is spring? The spring water of dingdong mountain stream says: it is the milk that moistens all things in the world, and the life hymn played by beautiful melody
What is spring? The innocent child said: it is a beautiful fairy tale piled up with sand, and a colorful dream depicted by crayons
Spring is the best time for seeds to germinate
Spring is the season of flowers and the beginning of a year

What are the factors of 80

The factors of 80 are: 1,2,4,5,8,10,16,20,40,80

Calculate the indefinite integral ∫ Xe ^ (1 / x) DX,

∫xe^(1/x)dx
=-∫xe^(-x)d(-x)
=-∫xde^(-x)
=-(xe^(-x)-∫e^(-x)dx)
=-xe^(-x)+∫e^(-x)dx
=-xe^(-x)-∫e^(-x)d(-x)
=-xe^(-x)-e^(-x)+C

A shot put weighs 4 kg and its volume is about 0.57 cubic decimeter. Please explain whether the shot is hollow or solid by calculation (the density is 13.3 times 10 cubic meters)

Mass of solid shot put with a volume of 0.57 cubic decimeter
=(0.57 × 10 to the negative third power) × 13.3 times 10 to the third power
=581 (kg) > 4 kg
therefore
This shot put is hollow!

It is known that a is the opposite of - (- 5), B is 4 larger than the smallest positive integer, and C is the largest negative integer. What is the value of 3A + 3B + C?

A is the opposite of - (- 5), B is 4 greater than the smallest positive integer, and C is the largest negative integer
∴A=-5,B=5,C=-1
3A+3B+C
=-15+15-1
=-1

The locus of a point whose distance from the plane to the origin of the coordinate is 1 is the unit circle, and its equation is X & # 178; + Y & # 178; = 1
The locus of a point with a distance of 1 from the coordinate origin on the plane is the unit circle, and its equation is X & # 178; + Y & # 178; = 1. In space, what is the locus of a point with a distance of 1 from the coordinate origin? Try to write its equation

Space coordinate system and plane are the same principle, only more than Z axis
Set point (x, y, z)
(x-0)²+(y-0)²+(z-0)²=1²
We get X & # 178; + Y & # 178; + Z & # 178; = 1
The formula of distance from point to point in space is similar to that of plane. It can be understood that the plane is the diagonal of a rectangle, and the space is the diagonal of a cuboid

How to distinguish "control variable method", "equivalent substitution method", "modeling method", "analogy method" and "transformation method" in junior high school physics,
Best example

The physical method is not only the method for scientists to study problems, but also the method commonly used by students in learning physics. The new curriculum standard also requires students to master some physical methods to explore problems. The model method is to express abstract physical phenomena with simple and easy to understand concrete models

The width of a rectangle is a meter, and the length is 1.5 times of its width. How much is its perimeter and area

Perimeter = (a + 1.5A) × 2 = (2.5A) × 2 = 5A (m),
Area = a × 1.5A = 1.5A & sup2; (M2),

In the parallelogram ABCD, BC + cd-ad equals ()
A. BAB. BDC. ACD. AB

BC + cd-ad = BD + Da = ba