Answers to the exercises and tests in lesson 22

Answers to the exercises and tests in lesson 22

The ideal kite. 1. Horizontal to Xiang detailed 2. Dryness 2. Drum 2. Bath 3. Present 4. Whoosh fast 5. Jump over to 3. 1. Turn the two upside down 2. Draw a clear line between the two and the old words 3. Change the mild to wonderful 4. 1. Praise the teacher 2. Understanding the teacher's words 3

Idiom pairs
Example: plain food (delicacies)
Make a deer a horse
Be quick in the snow

Everlasting (everlasting)
Call a deer a horse
Meticulous (rough)
Sending charcoal in the snow
Glib (clumsy)
children
Have you ever thought about it?
Think for yourself
I can't think of a good way to ask
Or your head will rust~~~

Can you cook the meals?
translate

Can you cook?

Xiao Ming goes to the experimental junior high school 1000 meters away from home every morning

Is it junior high school or primary school

Let a be a nonzero real square matrix of order n and the adjoint matrix satisfying a is equal to the transpose matrix of A. It is proved that det (a) is not equal to zero

It is known that a * = a ^ t
So AA ^ t = AA * = |a|e
Because a ≠ 0, there exists AIJ ≠ 0
Consider the elements of row I and column I in AA ^ t
ai1^2+ai2^2+...+aij^2+ ...+ain^2 = |A|
Then AIJ is a real number, so | a | > 0
So | a ≠ 0

Is it singular or plural after don't have?
RT
As for have no, is it singular or plural?

Have no is followed by singular, because no means none
After don't have, it depends on the situation. If it is followed by a single compound, use that word directly. If it means plural, use plural. If it means singular, use singular

The bookstore bought a batch of story books. The first question sold 11 out of 25, the next day sold 160, and the remaining 120. How many books were sold on the first day?

Find out the total number of the books first
(160 + 120) / (1-11 / 25) = 500 copies
500 copies sold on the first day * (11 / 25) = 220 copies

Draw the largest triangle in a square with a side length of 4cm. The area of the triangle is () square centimeter

When the triangle is the largest, its bottom is on the side of the square, and its height is equal to the side length of the square
Area = 0.5 * 4 * 4 = 8 square centimeter
If you have any questions, you can ask, O (∩)_ ∩)O~

English translation
1. Node analysis and transformation of people's Park
2. Node analysis
3. Function analysis
4. Current situation analysis
5. Transformation analysis

Analysis and Reformation of the Node of the People's Park
2.Node Analysis
3.Function Analysis
4.Analysis of Current Situation
5.Reformation Analysis

A cuboid, 30 cm long and 20 cm wide, contains 10 cm deep water. There is a cuboid stone, 8 cm wide and 15 cm high
Put the stone into the container horizontally, how many centimeters will the water rise

I don't understand what you mean by horizontal
The volume of water rising is equal to the volume of rock immersed
1. If the stone falls down, it can be completely immersed in water
Volume of stone = 8 * 8 * 15 = 960
Height of water surface rise = 960 / (30 * 20) = 960 / 600 = 1.6 (CM)
2. If the stone is put in directly, it cannot be completely immersed in water
Suppose the water surface rises x cm
8*8*（10+x）=30*20*x
640+64x=600x
560x=640
x≈1.1