A few shocking questions, those who will come, those who will not come!

1.This straight road across the city center is very wide.

2.This historic stone hole bridge over the river is still strong after the baptism of war.

3. Fighting the waves and saving people: Wei Qinggang.

With the help of a DV image inadvertently left by an ordinary citizen in Qingdao, we got to know a civilian warrior - Wei Qinggang.

On August 8 last year, hundreds of people gathered on the coast of Laoshan in Qingdao. Unexpectedly, a huge wave hit and swept a young woman on the shore into the sea. At this time, Wei Qinggang, who was on the shore and came to Qingdao from rural Henan to work as a decorator, did not hesitate at all, jumped off the wave wall more than two meters high, and swam towards the young woman who fell into the water.

Once, twice, and three times, Wei Qinggang fought with the giant waves for 40 minutes, and before going to the sea to save people this time, he had never seen the sea, nor had he ever swam in the waves, and only had the experience of bravely rescuing people who fell into the water twice in his hometown.

Dressed in clothes soaked in seawater and dragging his extremely tired body, Wei Qinggang walked slowly back to the shed. Three days later, people learned the name of the hero Wei Qinggang. Wei Qinggang's righteous deeds are heroic, but his words are extremely simple:

When I was young, my father told me that if I could, I would help others as much as I could. If you have difficulties, others can help you, and when others are in difficulty, you don't help others, and your kindness is in**? I always think that other people's lives are lives, and my own lives are also lives, for example, if I sacrifice myself, it is the same for other people's lives. ”

1.Network. Unlimited traffic.

2。Lugou Bridge. It turned out that after a brutal war, it still stands.

3. I picked up a penny on the side of the road and gave it to the policeman's uncle.

Summary. Hello dear, post the question.

This question will not be, please tell me, thank you.

Hello dear, post the question.

Wait a minute, pro.

Ok thanks.

And this. Hold on.

What are the similarities and differences, please tell me.

Similarities: The two can be converted to each other, for example: 1 5 = different dismantling points:

The meaning is different. True scores usually indicate the relationship between the part and the whole, for example, 1 4 for the whole classThe small cong royal number usually indicates a specific number, for example, a pencil yuan;

Give the answer and give a thumbs up.

Ok thanks.

1.(99-5) (12+13) = hours.

After Lan Lan traveled for an hour, the two of them were 99 kilometers apart.

Let's pour x kilograms of oil from bucket A and let the skin pour into bucket B.

45-x=45-x=36+

x = pour kilograms of oil into barrel A and pour barrel B into barrel B, so that the mass of oil in barrel A is twice that of barrel B.

1. Set x hours after the Zen elimination chamber is 99km apart

12x+13x+5=99

x = 2, set up a congratulatory banquet to know x kilograms of oil poured into a barrel.

45-x=(24+x)×x=

The former: a barrel with wine, the latter: an empty barrel, pick up a piece of paper, and return my campus to a clean public community please order through the teacher:

Poetry and songs, can't praise your care for us. You are the match that lights us and burns yourself; You are the key that opens the door to knowledge for us; You are the boat, sailing us to the other side of success. Xueyou:

There is a confidant in the sea, and the end of the world is like a neighbor.

The former refers to a barrel containing wine, and the latter refers to an empty barrel.

1.Solution: Let dragonflies have x, cicadas have [(20-2x) 1], and spiders have [18-x-(20-2x) 1].

6x+6[（20-2x)/1]+8[18-x-（20-2x)/1]=118

6x+120-12x+8[18-x-20+2x]=118

6x+120-12x+144-8x-160+16x=118

6x-12x-8x+16x=118-120-144+160

2x=14x=7(20-2x) 1=(20-2*7) 1=(20-14) 1=6 1=6.

18-x-(20-2x) 1=18-7-(20-2*7) 1=18-7-6=5.

A: There are 7 dragonflies, 6 cicadas, and 5 spiders.

2.16 4 = 4.

Solution: Suppose a chicken has 2x legs and a rabbit has 4 (x-16) legs.

2x-4（x-16）=16

2x-4x+64=16

2x=-48

x=24 rabbits: 24-16=8 rabbits.

A: There are 24 chickens and 8 rabbits.

Question 2: I don't know if you write one less condition, if there is only one condition, the number calculated is different... Take a good look at it ...

Spider = x, dragonfly = y, cicada = z

1）x+y+z=18

2）8x+6y+6z=112

3）2y+z=22

It is sufficient to solve the above 3-element first-order equation.

Chicken = x, rabbit = y

2x-4y=16, i.e. x-2y=8

Several represent x,y are both 10, so x=10,y=1

3 + 31 + 30 + 31 + 30 = 125 (days).

There are 125 days in total for this semester.

February - 3 days.

March: 31 days.

April: 30 days.

May: 31 days.

June 30 days.

There are 125 days in total.

If you remove the week.

5. Saturday rest days and holidays (39 days in total), a total of 86 days of school time.

Solution: Assuming that the year is a normal year, then there are 28 days in February, and then there are 3 days from February 26 to February 28. Next up:

The month of March is 31 days, the month of April is 30 days, the month of May is 31 days, and the month of June is 30 days.

July 1st is already a holiday, so July 1st is not considered a semester day.

Therefore, the number of days in this semester is: 3+31+30+31+30=125 daysAssuming that the year is a leap year, then there are 29 days in February, then the number of days in this semester is: 125+1=126 days.

m+n power of a; A to the 5th power.

A to the nth power multiplied by b to the nth power; A to the 3rd power by b to the 3rd power A to the m by n power; A to the 6th power.

m+n power of a; a

A to the nth power.

2) A times (b to the third power).

Test center 2 is 1, 18 times x x cube by y

2, x by the power of y squared - 2 times x times y squared.

3,2 times x squared + 5xy-12y squared.

Multiply or divide with the base, the base does not change, and the exponent is added and subtracted accordingly.

200*2/(60-40)=20m/s

20*40+200=1000m

3x+10=y

5x-4=y

x=7，y=31

It is not in accordance with the regulations, because the sum of the inner angles of the triangle is 180