The theme is a popular science essay with the theme of experience, innovation and growth, more than

∵∠2+∠4=180°，∠2=82°

a||b (equal isotope angles, two straight lines parallel).

c||d (equal isotope angles, two straight lines parallel).

As shown in the figure above, a is parallel to b and c is parallel to d, so 2, 4, 3, and 4 are all isotope angles, then 2= 3= 4, 4 and 1 are complementary angles, so 4=180-98=82°, so 2= 3=82°

Because of the top angle, so angle 2 and the angle opposite it are equal, angle 1 is also then the two angles complement each other, so a parallel b, because a is parallel to b, so the inner wrong angle of angle 3 is equal to it, angle 3 is equal to angle 2, so the inner wrong angle and angle 2 are equal, so c parallel d

1.No, because the psalmist thinks we should step on it.

To live harshly, if we deceive life, we will eventually regret ourselves.

2.To be a down-to-earth person, there is a give-and-take, to do things worthy of your own heart, when you are willing to give will eventually get a matching peace of mind return.

If life deceives you: tell us to be brave in the face of life's setbacks.

b.If you deceive life: tell us to face life with our feet on the ground.

These are my own understandings, and if you're wrong, forget it.

1.No, because life doesn't end there.

One day, it will teach you to admit your mistakes to it.

2.Life can only lead to success if you are down-to-earth, and if you cheat life, life will cheat you.

I don't know. You look for the answer or something, no, I'll buy you a copy.

1.Procrastinate.

2.Embarrassment wants time to pass quickly.

3.I have never waited for anything so patiently, and the panting of the fat gentleman beside me, the beating of the winter and winter on this stage, the swaying of red, green, and green, and the twelve.

4.Loud and loose.

There are x unsolved metas, and there are (36-x) metas.

Then: x=24

36-24 = 12 copies.

There are 24 copies of the answer yuan, and 12 copies of the unit price.

(1) Isotope angles: 1 and 8, 4 and 7, 2 and 5, 3 and 6 internal angles: 1 and 3, 2 and 4, 5 and 7, 6 and 8 co-adjacent internal angles: 4 and 8, 3 and 5

2) Think for yourself, it's very simple, if there are too many words, you won't send it.

Isotope angles 2 and 5, 3 and 6, 4 and 7, 1 and 8, internal angles 4 and 5, 3 and 8, i.e. internal angles 3 and 5, 4 and 8

A and 5 are the same internal angles formed by AC truncating AB and DE A and 6 are the internal error angles formed by AC truncating AB and DE A and 8 are the isotopic angles formed by AC truncating AB and DE Question 2: Extend AC through point A, AB turns the triangle clockwise 120 degrees to see, and then marks the angle to see it.

Isotope: 18, 47, 25, 36

Internal error: 45, 38

Ibid.: 48, 35

a5: ac truncates ab, de.

a6：。。of internal errors.

a8: ac truncates the isotope of de, ab.

(1) Isotope angle: angle 1 with angle 8, angle 2 with angle 5, angle 3 with angle 6, angle 4 with angle 7. Inner wrong angle: angle 3 with angle 8, angle 4 with angle 5. Same side inner angle: angle 4 with angle 8, angle 3 with angle 5. Pity me for giving you an answer after the lights go out in my dorm room.

Isotope angles 4 and 7, 1 and 8, 2 and 5, 3 and 6. Inside Wrong Angle: 4 vs. 5, 3 vs. 8. Ipsilateral inner angles: 4 and 8, 3 and 5.

It is the same side inside angle of ac truncating ab and de, ac truncating ab and de internal wrong angle, ac truncating ab and de as the same para inner angle.

The flat road is x km, the uphill is y km, and the downhill is z km.

x＋y＋z＝240

60＋y÷30＋z÷90＝4

x÷60＋y÷90＋z÷30＝16／3

Enlarge the last two equations by a factor of 180.

3x＋6y＋2z＝720

3x＋2y＋6z＝960

The first equation becomes x 240 y z, and then the next two equations are brought in to get 3y z 0

3z－y＝240

z=3y, bring in 3z, y 240, and get 8y, 240y, 30, z=90, x=120

How many kilometers is there from A to B on the road? Uphill km y, downhill (240-x-y) km.

There is x 60+y 30+(240-x-y) 90=4, simplified x+4y=240

When you come back, the uphill slope becomes downhill, and the downhill becomes uphill.

There are x 60+y 90+(240-x-y) 30=16 3, simplified 3x+4y=480

The solution is x=120 and y=30

So there are 120 kilometers of road from A to B? 30 km uphill and 90 km downhill.

Uphill road length x downhill road length y flat road length (240-x-y) The equation can be obtained: x 30 + y 90 + 240-x-y 60 = 4y 30 + x 90 + 240-x-x 60 = 16 3 can be obtained: 6x+2y+720-3x-3y=720 6y+2x+720-3x-3y=960

3x=y 3y-x=240 (bring y=3x in) x=30 y=90

The uphill road is 30 km long, the downhill road is 90 km long, and the flat road is 120 km long.

What does it feel like to fly? I often look at the window in a daze. Outside the window was a blue sky, and a few white clouds like light veils lingered in the sky, motionless, as if pondering something.

The canopy is like a huge relief, and from time to time one or two small birds fly over the surface of the relief, sometimes the swallows whisper, sometimes the sparrows are noisy, and sometimes flocks of geese are seen lining up. I yearn for the blue sky, and the sky is high for the birds to fly.

If I could fly, I would have angelic white wings. He flew out of my window and soared. One moment to rise, one moment to hover, another moment to swoop down, let me also experience the taste of eagle striking the sky.

With fresh air, gentle wind, and dazzling sunshine, the sky is my eternal home. There won't be so many high-rise buildings blocking my view, there won't be so many cars and people coming and going that make it difficult for me to move an inch, and there won't be any homework, no books to read, and no exam papers. There is freedom, there is space, and there is plenty of time to play a game on the grassy hillsides, in the lush woods, and in the fields after the harvest.

If I could fly, I would like to have an Aladdin's magic carpet, and I would be the freest traveler. I want to stand high in the clouds and watch the great rivers and mountains of the motherland. The Wolong Mountains are shrouded in clouds and mist, and there are quiet and elegant aristocrats living - giant pandas; The tropical rainforest scenery of Xishuangbanna is so peculiar, and it is even more lively during the Songkran Festival; The strange pine and strange stones of Huangshan and the hot springs of Yunhai make Chinese and foreign tourists linger and forget to return, and there is a saying that "the return of Huangshan does not look at Yue"; The grasslands of Inner Mongolia are vast and boundless, and when night falls, bonfires are lit one after another, and people sing and dance around them, and they are intoxicated with happiness.

If I could fly, I would like to be a floating cloud. In winter, I lazily spread around the horizon and lace the blue sky. In the morning, the morning sun burns me, and in the evening, the sunset reflects me, and I decorate people's lives with my unique beauty.

In the summer, I use my body to shield people from the scorching sun, so that people can enjoy a little coolness in the heat, and I will bring a rain to the arid land in time to make the crops in the fields thrive.

What a wonderful thing it would be if I could fly. Yet I was just one of thousands of ordinary elementary school students. But I will work hard, and dreams will make my life more fulfilling.