Five expressions One example for each

Five expressions One example for each

Lyric is to express and express the author's feelings. It is the main way of expression in lyric style, and it is often used as an important auxiliary means of expression in general literary works and narratives

Prose is mainly divided into () prose, () prose, () prose and () prose

Prose can be divided into narrative prose, lyric prose, philosophical prose and argumentative prose

In the plane rectangular coordinate system, the parabola y = ax + BX + C, intersects with the X axis and two points AB, intersects with the Y axis and C. the known axis of symmetry is x = 2, B (3,0) C (0, - 3,)
Find a point P on the parabola symmetry axis to make the distance difference between P and BC maximum, and find the P coordinate

Let the axis of symmetry be x = 2 and the intersection B (3,0) of the parabola and X-axis be known
So a (1,0)
And the symmetry axis is x = 2, the distance from P to a and B is equal, that is pc-pb = pc-pa
Pc-pa again

What is the density of sand? How much is a cubic meter of sand?

How much is a cubic meter of sand? According to the density table of junior high school physics textbook, the density of sand is 1400KG / m3, so the mass of a cubic meter of sand is 1400KG, that is 2800 Jin. Of course, this is only a kind of sand

The addition and subtraction of integers is essentially_____ And_____ -?

The essence of addition and subtraction of integers is to merge similar terms,

We should consider the positive and negative for the surface integral of coordinates, but why don't we consider the positive and negative for the surface integral of area curve

It's called area. Can area be negative? No, because DS > 0
It's the same for the line integral of arc length, because DS > 0
How about definite integral for area? It's the same, DX > 0

The rate of advance between the two volume units is 1000

Wrong. The rate of cubic centimeter and cubic meter is not 1000

2abc-a^2c-b^2c

-c(a^2-2ab+b^2)
= -c(a-b)^2

Given that the distance between the point (- 2,3) and the focus of the parabola y ^ 2 = 2px (P greater than 0) is 5, the value of P is

Focus (P / 2,0)
The distance is five
So (- 2-P / 2) ^ 2 + (3-0) ^ 2 = 5 ^ 2
So - 2-P / 2 = ± 4
And P > 0
So p = 4

The unit of force is (), abbreviated as (), which is indicated by letters ()

A body under gravity can be measured with a spring dynamometer. The unit of force is Newton, which is denoted by the letter n