Sentence making in sixth grade Chinese Example: don't dream about the future, no matter how fascinating it is; don't miss the past, no matter how beautiful it is; let's act! Write after this sentence Don't No matter ; don't No matter ；……

Sentence making in sixth grade Chinese Example: don't dream about the future, no matter how fascinating it is; don't miss the past, no matter how beautiful it is; let's act! Write after this sentence Don't No matter ; don't No matter ；……

Don't regret what you have done, no matter what the result is; don't despair about the future, no matter how thorny it may be; let's hope for the future, forget the painful past and face a new future!

It is true that sometimes it is not,
Cough, it's wrong. It's wrong. It's true. Sometimes not. I'm sorry

Many students think that parents are very nagging, indeed. Sometimes, they even have to ask a little thing, but this is not boring, but concerned about you, really should be concerned about you, will ask you things, they love your family

The three internal angles of an acute triangle are all acute angles, the three internal angles of an obtuse triangle are obtuse angles, and there is at most one obtuse angle among the three internal angles of a triangle
The sum of the inner angles of an obtuse triangle is greater than that of an acute triangle, and the sum of the two smallest inner angles of a triangle must be greater than 90 degrees
The three internal angles of a triangle have at least two acute angles, lines, etc

All three internal angles of an acute triangle are acute (correct)
All three internal angles of an obtuse triangle are obtuse (wrong)
There is at most one obtuse angle among the three internal angles of a triangle (correct)
The sum of internal angles of obtuse triangle is greater than that of acute triangle (error)
The sum of the smallest two internal angles in a triangle must be greater than 90 degrees (wrong)
Three internal angles of a triangle have at least two acute angles (correct)

If the square of X + 6xy = 26 and the square of Y - 4xy = - 19, then the value of the square of X + 2XY + y is_____ .

The square of X + 2XY + the flat of Y
=The square of X + 6xy-4xy + the square of Y
=(square of X + 6xy) + (square of Y - 4xy)
=26-19
=7

Xiaohong is 10008 cm tall, 7 cm higher than Xiaoqiang and 4 cm shorter than Xiaoming. What is the average height of the three?

(x+x+7+x-4)/3=
x+1

We often use capillarity to solve problems in our life. Here are four examples
Which of you will answer this question

Towel absorbs water and wick absorbs oil. For example, capillary action causes water to rise along the glass tube. The adhesion of water to the glass tube causes water to climb along the wall of the tube and form a concave surface. However, surface tension causes the surface of liquid to contract and flatten the liquid level. The combined action of these two forces makes water gradually rise above the surrounding liquid level

Y=X^2(2-5X),(0

y' = 2x(2-5x) -5x^2= 4x - 15x^2 = 0x1=0,x2= 4/15y'' = 4-30x = 0x3 = 2/15y1= 0,y2= 16/225 *2/3 = 32/675y3= (2/15)^2 (2-5*2/15) = 4/225 * 4/3 = 16/675ymax = 32/675

The angle of drawing a plan of mechanical parts on a drawing with a scale of 1:20 is 40 degrees. This angle is actually () degrees

Or 40 degrees, scale according to the scale, does not affect the size of the angle

Mathematics, one dollar quadratic
If the equation 2x-3x + 1-A = 0 has real roots, then the value range of a is ()
Let a and B be the lengths of two right angles of a right triangle, and (a + b) (a + B + 4) = 21
Find the length of the oblique side of the right triangle

Because the equation has real roots, so the solution is a ≤ - 9 / 82. Because a and B are two right sides of a right triangle, so a ^ 2 + B ^ 2 = C ^ 2, so C ^ 2 (C ^ 2 + 4) - 21 = 0, and the solution is (C ^ 2-3) (C ^ 2 + 7) = 0, C ^ 2 = 3, because C > 0

In the process of calculating the air consumption of the cylinder, how to determine the flow rate of the cylinder?

Brother, are you asking about the cylinder of pneumatic components or automobile? Next time, I think it should be the former. About the calculation of air consumption: if the cylinder diameter of a cylinder is 50 mm, the piston rod diameter is 20 mm, the stroke is 300, and a cycle is completed in 2 seconds under 6 bar pressure