Spring has come and the weather is getting warmer and warmer. Flocks of geese flew back from the south neatly.
A slight spring breeze awakens everything, and everything smiles in the coming of spring; Blow green willows, and willows make green buds; Thin willow branches are as beautiful as braids of spring girls swaying in the wind; Colorful flowers have been blown away, and purple lilacs, pink peach blossoms, white magnolia, golden winter jasmine and fiery apricot flowers are competing to open; Blowing the ice and snow on the river, ducks croak and sing happily in the water; Groups of tadpoles are looking for their mother; Shrimp in the water, you chase me, I chase you, and play happily in the water.
The thin spring rain falls gently on the mountain, and the trees are green and the mountains are green. The grass came out of the soft soil and saw the colorful world. It shook its little hand and said, "Spring is coming, spring is coming, and spring is really beautiful."
2. Knowledge about frogs
Frogs are amphibians, and the most primitive frogs began to evolve in the early Triassic.
The earliest frog with jumping action appeared in Jurassic. Because frogs feed on insects and other invertebrates, they must live by the water.
Frogs belong to the animal kingdom, Chordata, Amphibia, Anura, Primate, Middle Frog and New Frog. English name frog.
Anurak is an amphibian. Adults are basically tailless. Eggs are usually produced in water, hatch into tadpoles and breathe through gills. After metamorphosis, adults mainly breathe through the lungs, but most skin also has some breathing function. It mainly includes two kinds of animals: frogs and toads.
There is no strict difference between these two animals, and some families have both. Generally speaking, toads live on land, so their skin is rough; Frogs are slim and good at swimming.
The two bodies are similar, with inconspicuous necks and no ribs. The ulna and radius of the forelimb healed, the tibia and fibula of the hind limb healed, the claws could not rotate flexibly, but the limbs were muscular.
Anurak is the first step for creatures to land from the water, which is more advanced than other amphibians. Although most of them can survive without water, their reproduction is still inseparable from water, and eggs need to undergo metamorphosis in water to grow. So it is not as advanced as reptiles, and it is completely possible to live without water.
Frogs [edit this paragraph] There are about 4,800 kinds of frogs, most of which live in water, and some live in trees in the humid environment of the rainforest. Eggs are born in water, and some tree frogs can get through the tadpole stage by accumulating residual puddles in tree holes or plant leaf roots.
In 2003, a new species of "purple frog" was discovered in western India. It lives in underground caves all the year round and only comes out to give birth when the monsoon brings rain. It is difficult to distinguish frogs from toads absolutely. Some families, such as Bufonidae, include both frogs and toads.
The smallest frog is only 50 mm, only as long as a person's thumb, and the largest frog is 300 mm (more than a foot long). Its pupil is horizontal, its skin is smooth, and its tongue is forked. Along the front of its mouth, it can suddenly turn out to catch insects. There are three eyelids, one of which is transparent to protect the eyes in water, and the other two upper and lower eyelids are common.
There are two sound sacs on both sides of the head, which can produce * * * and amplify sound. Smaller varieties have higher frequency of calls.
Some frogs' skin secretes venom to prevent natural enemies. A tree frog secretion living in the Amazon rain forest was used by local Indians to make curare and seal their throats with blood. Frogs are distributed all over the world except Caribbean islands and Pacific islands.
However, it is rapidly decreasing around the world, mainly due to environmental pollution, climate change, invasion of alien species, human expansion and other reasons. Frogs reproduce in a similar way to toads. They also feed on insects, but large frogs can prey on small fish and even mice.
They basically hunt at night. Frogs prey on a large number of field pests, which is beneficial to human beings.
It is not only the natural enemy of pests, but also the guardian of harvest. The familiar and pleasant sound of frogs is actually like beautiful music that nature can never play, and it is a quiet and harmonious field song. "In the fragrance of rice flowers, it is said that the harvest is good, and the frog hears it." Farmers have the hope of sowing when they have frogs, and the joy and joy of harvesting when they have frogs.
3. Write an article about frogs in spring
Spring has arrived. A person walking on a country road has smelled the faint fragrance of all kinds of flowers. Looking up at the sky, I seem to feel that the sky is bluer and more charming. Looking down at the grass, the grass is green again and again. It turned out that the grass covered the ground with a green carpet. Ah! What a beautiful scenery! So, I was thinking, winter goes and spring comes. What does it mean now that another season of spring is coming? Meaning, the four seasons? Means that everything is reborn? Means a new beginning? ..... it's really hard to guess. Seeing flowers and grass sprouting, my heart is full of joy and I dream of dancing on the grass and flowers. Looking at this vibrant grass and flowers, my inner joy can't be expressed in words. How I wish time would stay here for me, but time always flies so fast. Look, there are four seasons in a year: spring, summer, autumn and winter. This time, the arrival of spring comes after the first three cycles. I don't know how many times it is, but I always have an indescribable love, like the scenery and beauty of spring, because spring gives people a vibrant atmosphere. How many days have I fallen in love with spring since ancient times? I have read some poems that describe the beauty of spring.
Here, I won't give an example, and there are songs that sing the beauty of spring ... Everything is praising the beauty of spring. Although I can't write poems to describe the beauty of spring, I can't sing songs to praise the beauty of spring. I can only say in one sentence that my love for spring can't be expressed in words. Spring is the love of my life. Thank you-beautiful spring, I love you. Honey, it's not easy to answer this question. I hope to adopt. Thank you. You can keep asking questions. I'm happy to answer them.
4. The second grade composition is coming in spring, with frogs as the topic.
Spring has come and the weather is getting warmer and warmer.
Flocks of geese flew back from the south neatly. A slight spring breeze awakens everything, and everything smiles in the coming of spring; When the green willow branches are blown, the willow shoots green; Thin willow branches are as beautiful as braids of spring girls swaying in the wind; Colorful flowers have been blown away, with purple lilacs, pink peach blossoms, white magnolia, golden winter jasmine and fiery apricot flowers competing to open; Blowing the ice and snow on the river, ducks croak and sing happily in the water; Groups of tadpoles are looking for their mother; Shrimp in the water, you chase me, I chase you, and play happily in the water.
The thin spring rain falls gently on the mountain, and the trees are green and the mountains are green. The grass came out of the soft soil and saw the colorful world. It shook its little hand and said, "Spring is coming, spring is coming, and spring is really beautiful."
5. Little knowledge about spring
Among the four seasons, I like the scenery in spring best, especially in rainy days.
The day I remember, crystal clear, drizzling, fell to the ground. It sounds like a symphony played by nature. Willow also swayed with the wind, like a comb, gently combing Miss Liu's slender green hair. Now, raindrops are like naughty children, using Miss Liu's hair as a swing and circling around until she is tired. After a while, the rain eased a little, and the raindrops falling from the eaves gradually turned into a silver necklace. The flowers on the ground, swaying from side to side with the wind, seem to be dancing happily. In the pond, the orange fish jumped out of the water excitedly, and its splash seemed to add a wonderful paragraph to the music being played. Frogs on the shore jumped happily and croaked, as if to say, "Look, what a lively scene." The motionless bird in the nest seems to be the referee, feeling the cheerful atmosphere. At this time, it called several times, as if to say, "What a perfect performance."
The rain stopped, and it refreshed the doors, windows and cars of thousands of families in Qian Qian. What a diligent girl. After a while, all the animals came out. This is a harmonious atmosphere, and the earth has returned to its original state.