Introduce a dinosaur composition, limited to 150 to 200 words.

Tyrannosaurus rex, also known as Tyrannosaurus rex, is 13 meters long and weighs about 14 kg. The fossil division is in North America, the United States and western Canada! Tyrannosaurus rex can be said to be the fiercest animal among carnivorous dinosaurs, and Tyrannosaurus rex is the second largest carnivorous dinosaur in the world. But the body length is the fifth. Tyrannosaurus rex's main food was triceratops, because some scientists found that a triceratops had teeth marks on its bones. And it was bitten by Tyrannosaurus rex's teeth. Now people agree that the food of Tyrannosaurus Rex is Triceratops. Tyrannosaurus rex has a big head, small forelimbs, big and powerful hind feet, and its speed is 18? 19 km. I think Tyrannosaurus rex must be bloody when eating! One answer after another.

Self-report of pterodactyl

? I am a pterodactyl. Although I have two huge wings, I can't actually fly, because my wings are just simple films, and I can't take off by flapping them like a bird. But we can climb high first and spread our huge wings against the oncoming wind, so that we can glide in the airflow. I can also use the reaction force obtained by the wing membrane to make myself fly. When I fly high, I soar in the sky like a light plane.

? I used to be the master of the earth. At that time, the climate of the earth was mild, and we ate many plants and animals. Later, the earth changed and the original environment was destroyed. Although we dinosaurs were huge, our brains were not flexible and animals were not agile, so we could not adapt to the changes in the environment. At the same time, the development of some mammals poses a greater threat to us and our survival is worse. We are helpless in such an environment, at a loss, and eventually "extinct."

How to write an introduction about dinosaurs in 150 words? Urgent! Urgent! Urgent! Urgent! Urgent! This is urgent ... dinosaur, do you know who was the overlord of Jurassic? Let me tell you, that's Tyrannosaurus rex.

The following is its information: Tyrannosaurusrex, also known as Tyrannosaurus rex, is the only effective species in the current model species, or Tyrannosaurus rex. It is a large carnivorous Tyrannosaurus rex, about 13 meters long and weighing about 7 metric tons. It lived in the last 3 million years of the Maastricht stage at the end of Cretaceous, about 68.5 million to 65.5 million years ago, that is, the first Cretaceous.

Fossils are distributed in North America, the United States and western Canada, and the distribution range is wider than other Tyrannosaurus rex.

It's my favorite dinosaur.

Below is the hadrosaur, which lived in the late Cretaceous 65438+ billion years ago and was the peak of dinosaur development, so it was abundant, accounting for about 75% of herbivorous dinosaurs.

They are a large bird-buttock dinosaur.

At present (2008), it is found that the maximum length exceeds 2 1 m.

Due to the extension and lateral expansion of the maxillary and odontoid bones, the snout of the hadrosaurs formed a wide duckbill-shaped snout, hence the name.

I think it's cute.

Omnivorous dinosaurs, I prefer earthquake dragons.

Sei *** osaurus means "lizard of earthquake".

It was first discovered in 1979, New Mexico, USA, in the late Jurassic.

It has been found that the body has a tail; Back; Hips and hind limbs.

At first glance, it looks like Liang Long, but the earthquake dragon has a longer tail and a thick pelvis.

According to preliminary estimates, its length is at least 35 meters, even more than 40 meters.

But now it has shrunk to 32 meters long and weighs 22-27 tons.

Zhenlong has a long neck, a small head and a slender tail.

The nose grows on the top of the head.

Its head and mouth are small, with flat round teeth in front and no teeth in the back.

The front legs of zhenlong are shorter than the rear legs.

Each foot has five toes, one of which has claws.

The earthquake dragon walks on four feet and walks very slowly.

They live in groups.

Zhenlong is a herbivore. When eating, Zhenlong swallowed all the leaves without chewing.

Seismosaurus is one of the largest dinosaurs, but some scientists believe that the dinosaur fossils found belong to an oversized Liang Long.

It was once recognized that the longest dinosaur was zhenlong.

The next one is a long-necked dragon living in the sea.

Tanystropheus is a reptile that lived in the Middle Triassic, and its length is about 6 meters (20 feet).

The main feature is an extremely long neck, which is as long as 3 meters (10 feet), which is longer than the body and tail combined.

Although the neck is so long, it has only 12 vertebrae, and each vertebra is quite long.

Fossils of long-necked dragons have been found in Europe and the Middle East.

Many complete young specimens of sauropod were found in the Besano Formation in Italy, and the geological age was Latin period of Middle Triassic, about 232 million years ago [1].

The common name of long-necked dragon means "long spine"

This is the end of the introduction. Goodbye.

How to write Shu Xilong's composition 150 in grade one? Shu Xilong fossils are found in sedimentary rocks of continental lakes, and other fossils in the same place include a large number of amphibians and polychaetes.

Although scientists have not yet reached an agreement on the geological age of these rock formations, most scholars believe that their age is earlier than the Early Cretaceous strata in western Liaoning, China, which produced a large number of birds and hairy dinosaurs, and they probably belong to the Late Jurassic.

Shu Xilong's specimen represents a small individual. If you don't consider its long tail, it is only as big as a sparrow.

Its most peculiar feature is that the third finger is much longer than the other two fingers, which is different from any other known dinosaurs and birds.

Although the function of this super-long finger is not very clear, it is certain that this creature is a species adapted to living in trees, because not only the third finger of Shu Xilong is long, but also the second finger (toe), second finger and toe (the second finger or toe from the end) of its forelimb are relatively long.

These are the characteristics of adapting to life in trees.

In addition, the distal ends of Shu Xilong's first to fourth metatarsals are almost at the same level, which is very similar to many modern birds that are particularly adapted to living in trees, further proving its ability to live in trees.

Interestingly, some arboreal features of Shu Xilong are more advanced than the most primitive bird archaeopteryx recognized in the world at present.

This seems to indicate that the initial tree life of some theropod dinosaurs may be more related to finding food and avoiding being hunted than directly related to flying.

Shu Xilong's life time and its characteristics suitable for tree life also show that theropod dinosaurs began to live in trees as early as the early Cretaceous, before birds multiplied in large numbers.

This discovery makes the hypothesis that birds originated from dinosaurs more perfect and further supports the arboreal origin theory of bird flight.

The ancestors of birds are more likely to be groups living in trees than groups running on the ground.

Today, I visited the China Dinosaur Park in Changzhou.

When I came to the gate, a big stone gate came into view. There was an artificial waterfall on the right side of the gate. The waterfall was running down, and several white pigeons were flying around on the top of the stone gate.

I am so excited.

Entering Dashimen, our group walked into the China Dinosaur Museum along "Happiness Street", where I learned that the earth consists of three parts: crust, mantle and core. The extinction of dinosaurs may be caused by the collision between asteroids and the earth; Fossils are relics of ancient creatures buried in the stratum. Their origin is that the most common fossils are formed by teeth and bones.

I walked to the dinosaur exhibition hall. According to the map, there are three treasures in it: Lu Fenglong of Xushi, the first dinosaur fossil discovered in China; The Chinese dragon bird is a transitional creature between Mesozoic small carnivorous dinosaurs and birds; The giant Shandong Dragon, with a length of15m and a height of 8m, is known as the "Dragon King of China" with a fossil content of 80%.

After seeing the dinosaur fossils, we walked out of the China Dinosaur Museum.

I said, "China Dinosaur Park is too big. Let's rent a three-person bike.

"We visited the whole dinosaur park in a rented car. It was a feast for the eyes.

It was time to go home before I knew it, and I was reluctant to go back to the car.

Observe 306 words in dinosaur's composition. "Composition: Watching the Dinosaur Exhibition" Today, my mother and brother went to Cherry Valley for a barbecue.

Interestingly, everyone uses a screen name, and my mother's name is boundless leaves. She temporarily gave us two code names: my brother's name is spinach and my name is radish.

Mother said, "We are happy donkeys.

"As soon as I entered the cherry ditch, there was a long downhill road leading to the valley. I walked and felt as if someone was pushing me, so I ran down quickly. Very interesting.

The trees were covered with cherries, and people cheered and rushed at Zhe.

I picked one and stuffed it in my mouth, ah! Very sour.

It turns out that the cherry in the lower part has been picked, yellow and small, and it is not fully mature.

Looking up, the cherry in the high place is really big in Zhen Hong, but it is just out of reach.

What shall we do? Climb the tree! Spinach and radish scrambled to climb the cherry tree.

Let's choose one to eat. That's so sweet.

But there is always something bigger and redder in front of me. What a pity that I can't reach my arm on tiptoe! Once, click, I stepped on a branch and almost fell down.

After planting the trees, the big spinach takes out the cherries in its pocket and looks at them. Ah, it's all squeezed into thin soup.

We thought it was fun, but we scrambled to eat it.

At noon, eat barbecue.

The mutton kebabs baked by aunts are dark in front and immature in the back. Spinach and I are anxious to walk around the oven.

My mouth is black, and my mother says I look like a cat with a painted face.

Then someone tried to bake cherries.

What a beautiful day! Watch the dinosaur exhibition

Imagine the future of mankind by the extinction of dinosaurs 700 words Dinosaur is a "big MAC" species on the earth, and it should have strong vitality.

But it was extinct a long time ago.

Now all we can see are dinosaur fossils and models.

Many scientists in the world want to find out the reason of dinosaur extinction through the clues left by dinosaurs.

But the extinction of dinosaurs remains a mystery.

Some scientists believe that dinosaurs were poisoned by eating poisonous flowers and plants:/kloc-0.2 billion years ago, some flowering plants often contained strong alkaloids, and some alkaloids were very toxic. After dinosaurs ate a lot of alkaloids, the toxin reaction led to serious physiological disorder and death.

Some scientists believe that the extinction of dinosaurs was caused by volcanic eruption caused by asteroid impact: about 65 million years ago, a huge asteroid or comet fell from the sky and hit the earth at a speed exceeding 10 km per second.

The powerful explosion shock wave swept half the earth, and most dinosaurs were wiped out.

After the shock wave, the global fire and high temperature caused by the explosion caused some dinosaurs to be burned and roasted to death.

Later, the temperature plummeted and acid rain got wet. This extremely harsh environment buried the last dinosaur.

No matter what causes the extinction of dinosaurs, the principle is the same, that is, the living environment has changed greatly, and it is no longer suitable for dinosaurs to survive, which eventually leads to the extinction of dinosaurs.

The extinction of dinosaurs reminds us of the extinction of other species on earth. Why not?

With the continuous destruction of the earth's environment, floods, earthquakes, tsunamis and other natural disasters occur frequently, and the human living environment is facing serious threats.

If it is not stopped and protected, human beings will end up like dinosaurs.

Therefore, we should strive to protect the environment, green the environment, do not cut down trees indiscriminately, do not dump garbage indiscriminately, do not discharge pollutants indiscriminately, and do not waste the earth's resources, so as to create a beautiful living environment for future generations and prevent mankind from repeating the mistake of dinosaur extinction.

Although Tyrannosaurus Rex is notorious, it does not affect that it is a loving mother who wrote the word 150 ... Tyrannosaurus Rex gave his life to protect eggs. Li Changji, a sixth-grade student in Luobei No.4 Middle School in Heilongjiang Province, was in the era when dinosaurs flourished 100 million years ago. I followed the visit and came to the bloody environment where plants flourished and dinosaurs competed for hegemony.

I saw a giant Tyrannosaurus rex guarding its eggs. For the sake of these soon-to-be-born babies, this dutiful mother Tyrannosaurus Rex wholeheartedly guards her eggs.

It has not eaten for more than 20 days and is exhausted by hunger and fatigue. But when it comes to the little Tyrannosaurus Rex, its hard days are coming to an end, and its face still shows a happy smile.

At this critical moment, there was a rustle in the grass not far away.

Seven egg-stealing dragons came out of the grass. The egg thief is a guy who specializes in eating dinosaur eggs. Although he is not big, he is extremely fierce and cunning, and is known as the "grassland killer".

They have long been eyeing this nest of dinosaur eggs, but they are afraid of the power of the mother Tyrannosaurus Rex, so they dare not make a move. These days, they are constantly scouting for information. They knew clearly that the female Tyrannosaurus rex had no strength long ago, let alone fighting with them. I'm afraid she doesn't even have the strength to stand up They just took this opportunity to grab eggs.

Although the mother Tyrannosaurus rex wholeheartedly protected the eggs, the egg thief's every move did not escape its eyes. Unfortunately, it is too weak. In normal times, these egg thieves would have become its delicious meal, but now they can't.

The cunning egg-stealing dragon soldiers attacked the female Tyrannosaurus rex in three ways, and the female Tyrannosaurus rex fought fiercely with these egg-stealing dragons for the sake of their children.

The egg-stealing dragon is small and flexible and good at running. They first use the wheel war to consume the physical strength of the female Tyrannosaurus Rex, and then jump on the female Tyrannosaurus Rex to bite. The mother Tyrannosaurus rex shook her body desperately and threw them all out.

Don't be afraid, the egg-stealing dragon will immediately organize a second attack. The female Tyrannosaurus rex is getting weaker and weaker, covered in blood. It used its last strength to fight the egg-stealing dragon.

After a life-and-death struggle, both the female Tyrannosaurus Rex and the egg thief fell in a pool of blood.

At this time, a dozen little Tyrannosaurus rex hatched, adding new blood to the Tyrannosaurus rex family, and the Tyrannosaurus rex family became more and more prosperous.

I just followed the tour back to our real world.

On Monday, my mother took me, my brother and my friends to see the dinosaur exhibition. Along the way, we talked and laughed and soon reached our destination. Then we entered the exhibition hall and a burst of thunder came to our ears. Ah, it was a mechanical dinosaur running. We heard voices and rushed here to see many dinosaurs, including pterosaurs, Triceratops, Tyrannosaurus Rex and Liang Long, and some shook their heads. Others flapped their wings in different positions. Of all the dinosaurs, I remember the flying pterosaur best. It has a sharp mouth, small claws and the most striking wings. This pterosaur is a mechanical dragon. Its wings fluttered up and down, and a series of harsh cries came out from its mouth full of teeth. There are some butterfly specimens in the dinosaur exhibition. There are butterflies and jade and emerald blue spots. I like Papilio Papilio best, which is also called Papilio Papilio and Papilio helenus in English. It belongs to the large Papilio Papilio, with typical wing shape and pure black background. There are three white patches in the front of the hind wing, which look like a young Japanese monk resting, so it is called a resting butterfly and a Buddha butterfly. There are not only huge dinosaurs and beautiful butterflies, but also various rare fossils such as trilobites and butterflies.

On the morning of May 2, my mother and I went to the People's Park to watch the dinosaur exhibition, and saw a 300-word dinosaur exhibition.

As soon as we entered the park gate, we saw a sea of people, almost all of whom came to see the dinosaur exhibition.

I asked my mother, "How far is it from the dinosaur exhibition area?" Mom said, "Maybe it's just ahead.

"Sure enough, I walked a little further and saw a large clearing surrounded by inflatable walls. This is the exhibition area.

As soon as I entered this area, I was fascinated by all kinds of dinosaurs with different shapes, including Tyrannosaurus Rex, Triceratops, Pachysaurus, Allosaurus, Liang Long, Clatot, etc. , the composition of the first grade of primary school, "Looking at the dinosaur exhibition composition 300 words".

Some of these dinosaurs lived in the early or late Jurassic and some in the early or late Cretaceous, which can be distinguished by the number of their toes. The more toes they have, the farther they live. On the contrary, the fewer toes, the closer they live.

I think these dinosaurs are particularly interesting. They taught me a lot about dinosaurs, so I reluctantly left the exhibition area after watching them for a long time.

There are many theories about the extinction of dinosaurs, and the most common one is the asteroid impact theory.

According to this theory, an asteroid-like substance not only hit the Central American region of the earth, but also broke the crust, causing the magma inside the earth to erupt violently, which led to the eruption of a super volcano. According to the isotope content of Gumala rock, the power of this eruption is much higher than the maximum energy of Huangshi super volcano (the diameter of a common crater is several hundred meters, and the diameter of the hole hit this time exceeds 148 km), and the whole earth is covered with thick volcanic ash and toxic gas.

The combination of these factors led to the extinction of this creature.

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