how many changes does a cicada undergo in its life?
Cicadas have to undergo several changes in their life
Cicadas have to molt four or five times in their life, and then they have to get out of the ground, climb the branches and molt in turn (called golden cicadas) to become adults.
Cicada is a Hemiptera, and there are 121 species in China. When summer comes, it will stand on the tree and bark endlessly, and its voice will spread far away.
Cicada is an insect, also known as cicada. There are many kinds of them, and the male cicada has a sounder in his abdomen, which can make a loud sound continuously; Although the female cicada also has a sounder in her abdomen, she can't make a sound.
The larvae live in the soil and suck the roots of plants. After living underground for 4 years, they will drill out of the ground and enjoy the scenery for a while. Adults only suck the juice of plants.
A cicada's life goes through three different stages: egg, larva and adult. Eggs are laid on trees, larvae live underground, and adults return to trees. After the cicada mated, the male cicada completed his mission and soon died. The female cicada began to lay eggs. She used a pointed ovipositor to stab holes in the branches, producing four to eight at a time. A branch often needs dozens of holes, and then the female cicada died quickly without eating or drinking. The eggs overwinter in the branches, and only in the next summer, with the help of the temperature of the sun, can the larvae hatch. What are the changes in a silkworm's life?
It takes more than forty days for a silkworm to go through its eggs, ants, mature silkworms, cocoons and moths. And those animals, such as silkworms, have to undergo several changes in their life < P >. For example, tadpoles turn into frogs, pupae into butterflies, silkworms turn into moths, and flies, mosquitoes and dragonflies all undergo metamorphosis. For example, what other animals, like silkworms, go through several changes in their life < P > A type of insect metamorphosis, which means that adults and larvae are similar in shape and living habits, but their bodies are smaller, their reproductive organs are undeveloped, their wings are not fully developed, and their life history goes through three stages: larvae, nymphs (or juveniles) and adults. Such as locusts, dragonflies, crickets, crickets and so on.
This kind of insect, which has no larval stage and pupal stage completely different from adults, is called "incomplete metamorphosis". This kind of insects can be divided into gradual metamorphosis, semi-metamorphosis and over-metamorphosis according to the differences in morphological characteristics and living habits between larvae and adults.
locusts belong to incomplete abnormal insects. The first instar nymph's wings are very small, with only one wing bud, and the wing bud grows up every molting. After molting for five times, the nymph's body grows up gradually. By the fifth instar (the last instar), the nymph's wings are about half the length of the abdomen, while the adult's wings are slightly longer than the abdomen. Butterflies undergo several metamorphosis
A butterfly's life development goes through four stages: egg, larva, pupa and adult. The eggs of egg butterflies are generally round or oval, with a waxy shell on the surface to prevent water evaporation, and a fine hole at one end, which is the passage for * * * to enter. The size of eggs of different species of butterflies varies greatly. Butterflies usually lay eggs on the leaves of plants that larvae like to eat, and prepare food for larvae. Larvae after hatching, the larvae mainly eat, eating a lot of plant leaves. The larvae have various shapes, including carnivores and caterpillars. Butterfly harms agriculture mainly in the larval stage. As the larva grows, it usually goes through several molts. Pupa larvae will become pupae when they mature. The pupae of butterflies don't spin silk for cocoons. Generally, the larvae fix themselves in a hidden place on the back of plant leaves with a few filaments, and then gradually harden into a pupae. When adults are sexually mature, they break out of the pupa, but it takes some time to dry and harden their wings. At this time, butterflies can't avoid natural enemies. After the wings are spread out, the butterfly can fly, and the front and rear wings of the butterfly are not synchronized, so the butterfly fluctuates greatly and has a beautiful posture when flying. The so-called "dancing" comes from the butterfly's flight.
Li Bai went through several accidents in his life
Li Bai was born in the prosperous Tang Dynasty. At the age of twenty-five, he left Sichuan alone and began to roam widely, from Dongting Xiangjiang River in the south to Huiji in the east, and lived in Anlu and Yingshan. Until the first year of Tianbao, on the recommendation of Taoist Wu Yun, Li Bai was called to Chang 'an to worship the Hanlin. His articles were famous all over the world. Later, because he was unable to meet the dignitaries, he abandoned his official position after only three years in Beijing and continued his wandering life. In the second year after the Anshi Rebellion, he was angry and difficult, and once joined the shogunate of Yong Wang Li Lin. Unfortunately, Yong Wang and Su Zong had a struggle for the throne. After the defeat, Li Bai was implicated and exiled Yelang. On the way, he was forgiven and wrote "Early Sending Baidicheng". In his later years, he drifted to the southeast and went to Li Yangbing, the county magistrate of Dangtu, a clan uncle, and soon died of illness. Some people say that "drunkenness leads to illness", that is, drinking causes illness and death.
Li Bai didn't show his fame all his life, but he had high expectations, was not afraid of power, and despised powerful people. There was a story about "Lux took off his boots", "Imperial concubine held an inkstone", "Imperial hand spoon" and "Dragon towel wiping spit". Unscrupulously mocked the equality, rank and order centered on politics, governance, power and strength, criticized the corrupt and defeated politics, governance, present and image at that time, and promoted the heroic spirit in the prosperous Tang culture with a bold gesture of resistance. Li Bai's ideology of opposing power and valuing is becoming increasingly mature with the enrichment of his life practice.
in the early days, it was mainly manifested in the equal requirements of "unyielding oneself, not doing others" and "making friends with princes", as he said in his poem: "In the past, I was drunk in Chang 'an, and five princes and seven nobles shared a glass of wine. In front of the heroic spirit, the romantic spirit will fall behind others! " ("Liu Yelang gives Judge Xin") "Encourage the nine masters, make fun of the waves, and be green and ignorant." (Ode to the Jade Pot) He sometimes utters grandiloquence of contempt for powerful people, such as "Gold and white jade buy songs and laugh, and get drunk and tire the moon and despise princes" ("Reminiscing about the past and sending the county yuan to join the army"), but it mainly shows his inner pride. With the understanding of the actual situation of high-level, high-level, power, strength, assembly and regiment, he further revealed the opposition between power and nobility at the grass-roots level of the people: "Zhu Yu buys songs and laughs, and dross raises talents." ("Ancient Style" Fifteenth) "Wutong nest finch, poncirus trifoliata."
(article 39 of "Antique") and do their best to ridicule the ugly behavior of those who steal the evidence, power and position because of flattering the emperor, such as: "The cart flies in the dust, and the pavilion is dark in the afternoon. China is more expensive than gold, and even the clouds open a house. He Huihe is crowned as a cockfighter. Breath dry rainbow, pedestrians are afraid. There is no ear-washing Weng in the world, who knows Yao and Zhi! " In tianmu Mountain Ascended in a Dream, he issued the loudest voice: "oh, how can I gravely bow and scrape to men of high rank and men of high office, who never will suffer being shown an honest-hearted face!" The significance of this artistic summary in Li Bai's poems is just as important as Du Fu's famous sentence "The wine and meat in Zhumen stink, and the bones on the road freeze to death" ("From Beijing to Fengxian to chant 511 words").
at the end of Tianbao, the politics, governance, form, and situation deteriorated day by day, and Li Bai linked opposition, power, nobility, and a wide range of societies, associations, approvals, and judgments. For example, "Answering the King on Twelve Cold Nights": If you don't see Li Beihai, where is the heroic spirit of Britain today? You don't see Pei Shangshu, but there are three feet of Artemisia spines in the earth grave. Teenagers have long wanted to go to the five lakes, and when they see this, they will spare Zhong Ding. Fight for the righteous cause of the fallen sages. ("it is hard to go"): Have you noticed, king of Yan in days gone by who venerated talents and built Terrace high, there is no doubt about the festival. Juxin and le yi are grateful for the kindness they have received, and they have done their best to serve the monarch with their talents. But Yan zhaowang died early, and who can reuse the wise men as he did? It expresses the disappointment and anger of the poet to the court because he is not reused.
In his poems, such as Book Feelings for Cai Sheren Xiong, Ancient Style No.51, Ascending the Hill and Looking at the Far Sea, Li Bai even made a sharp rebuke to Xuanzong himself by satirizing the present. In a word, it can be said that he developed the theme of anti-powerful in Tang poetry to the point of dripping and hearty. Ren Hua said that Li Bai "has been a guest for decades, and he has never lost his color for a day" ("Miscellaneous Words Send Li Bai"). This kind of consciousness of never giving in to power and dignity and bravely resisting for self-esteem has been an important content of attaching importance to personal value and attaching importance to the tradition since Wei and Jin Dynasties. It is under the new historical conditions that Li Bai inherited and carried forward this excellent tradition and became a superstar in poetry.
He is never satisfied with loneliness and loneliness, such as drinking Alone with the Moon, which shows that only a poet full of vitality can make such fantastic ideas. He has a "short song line", which conceives: "I want to win the six dragons and go back to the car to hang the fusang. With the help of the big dipper, each of the dragons advised them to drink a cup of wine, so that they all fell asleep and could not stay awake. Wealth is not what you want, and you are in the twilight. " Here, there is no old man's sigh, but he expresses his infinite attachment to life with the naive imagination of "persuading wine" These poems, with their pure taste, inspire the beautiful human nature submerged by vulgar life, and thus gain permanent charm.
Li Bai has a strong feeling for nature. He is good at melting his personality into the natural scenery, which makes the hills and valleys in his works all have idealized colors. He said in the poem "Going in and out of the day": "I will include a large piece, and I will be noble and have the same subject." He also said: "Yangchun calls me to smoke, and I take articles for a big holiday." (Preface to the Spring Banquet from My Brother's Peach Blossom Garden)
Li Bai has a heroic spirit and pursues a pure and noble mood. These different personality profiles also form two major differences in his artistic conception of mountains and rivers: one is to highlight the beauty of strength and movement in the majestic mountains and rivers, and express his lofty sentiments and strong thoughts in the magnificent artistic conception; The other kind is interested in pursuing the beauty of brightness and clarity, and expressing innocent feelings in beautiful artistic conception. For example, the Yellow River and the Yangtze River in his works are roaring and rushing: "how the Yellow River's waters move out of heaven, entering the ocean, never to return" ("Going into Wine"); "The Wan Li of the Yellow River touches the mountains, and the vortex hub turns to the Qin mines ... djinn growls and breaks the two mountains, and the Hongbo jet shoots the East China Sea" ("Xiyue Yuntai Song sends Danqiuzi"); "I climb to the top. I survey the whole world, the vast river will go or not. "yellow clouds that winds have driven hundreds of miles, and a snow-peak whitely circled by the swirl of a ninefold stream" (a Song of Lu Mountain to Censor Lu Xuzhou); "Poseidon has been to the evil wind, and the waves hit the stone wall of Tianmen. What's the matter with Zhejiang in August? Tao seems to be snowing in the mountains "(Hengjiang Ci).
The peaks in his works are towering and steep: "with the highest crag barely a foot below heaven, dry pines hang, head down, from the face of the cliffs" ("Difficult Road to Shu"); "in a straight line to heaven, its summit enters heaven, tops the five Holy Peaks, and casts a shadow through China; With the hundred-mile length of the Heavenly Terrace Range, which, just at this point, begins turning southeast "(tianmu Mountain Ascended in a Dream). He endowed the mountains and rivers with lofty aesthetic feeling with heroism in his chest. His eulogy to the great power of nature is also a tribute to the far-sighted and unremitting ideal of life. The extraordinary natural image is integrated with the heroic character of pride.
At the same time, Li Bai wrote many landscape poems with crystal clear and beautiful artistic conception. For example, "People swim around the moon and boats sail in the air" ("Send Wangwu Mountain people Wei Wan back to the King's House"); "Man rides the moon on the sea, and sails fall into the sky in the lake" ("Looking for Yang to send his younger brother to Changyou Poyang Sima Zuo"); "The moon turns with the green mountains, and the green hills flow with water. It's like being on the Milky Way, but I feel that Yunlin is secluded "("On a moonlit night, Jiang Xing sends Cui Yuanwai Zongzhi "); "Jinling night is quiet and cool, looking at wuyue on the west wing alone. The white clouds reflect the water and shake the empty city, and the white dew drops the beads and the autumn moon "("The Moon in the West Building of Jinling City "). These poems win with clarity and purity.
Li Bai's landscape poems are not so much realistic descriptions of natural features as images transformed and idealized according to the poet's personality. He only wants to grasp the overall momentum or atmosphere, splash ink and freehand brushwork on the basis of the sudden excitement, and ignore the specific details, even the order of visual transfer of the scenery is often not concerned.
Li Bai's landscape poems are all-pervasive and lyrical. He is good at infiltrating and blending landscape search with specific emotions, and there is a subtle relationship of "isomorphism and mutual feeling" between the situation of "scenery" and the characteristics of "emotion". For example, Seeing Friends Off: with a blue line of mountains north of the wall, and east of the city a white curve of water. Here we say goodbye to each other, and you, like fatherless, drift in the wind, and travel far away. Floating clouds like a wanderer, like wandering, sunset slowly down the mountain, seems to have nostalgia. The wave of his hand from this separation, the friend riding on the horse will carry his long journey, the long Blew, it seems to not bear to leave. The "floating clouds" and "sunset" in the poem are not only the foreground of the eyes, but also the figurative images with specific emotional content in the ancient poems, which means that once the wanderer is gone, it is like a floating cloud, so it is like a sunset to say goodbye and leave no gouge.
Another example is "When the clouds return to the blue sea and the evening sky, the geese are not blue. The first two sentences not only point out the season and time, but also use the images of "clouds" and "geese" to refer to parting and traveling. In addition, such as "sometimes white clouds rise, and the sky unfolds." With this in mind, I am grateful for every happiness "(Looking at the South Mountain to Send a Hermit to Zige)," oh, go and ask this river running to the east, if it can travel farther than a friend's love! "("parting at a Wine-Shop in Nanjing ")," Xihui chasing the water, rippling and wandering "("Swimming in Nanyang Qingling Spring ") and so on.
Li Bai's thought and sentiment of freedom and liberation and his personality with civilian tendency also enabled him to explore all kinds of human beauty in social life more deeply. There is a yearning for a peaceful life here, such as Midnight Wu Ge, the third: a slip of the moon hangs over the capital, ten thousand washing-mallets are pounding. The autumn wind blows the sound of Daoyi, every family remembers the people who guard the frontier. When will the border war be pacified and my husband end the expedition. There is praise for working life, such as "Song of Autumn Pu" XIV: "The fire shines on the heavens and the earth, and the red stars are everywhere. On the moonlit night of Lang Lang, the song moves in cold Sichuan. " All these poems, without exception, make the theme of daily life glow with poetic elegant demeanour with an ideal light wheel.
Li Bai is really a ranger among China poets. The great drifter enriched the landscape of the Tang Dynasty with his feet and poetic pen. He swept sturm und drang, and then, the smoke in Dongting, the wind and cloud in Chibi, the apes in Shu Road and the mighty rivers all flew up at once. In poetry, the poet is smart and heroic, like clouds in the sky; He wandered around octupole, galloping freely, like the horse of Mercedes Benz on the Yuan Ye. In the poem, the poet swept away the worldly dust and completely restored his immortal posture: above, he searched the Green Void, below, the Yellow Spring.
His romance, madness, love and hate, loneliness and pain, dreams and awakenings, his heroism and his wandering all reach extremes. His poetry creation has a strong subjective color, mainly focusing on expressing heroic spirit and passionate feelings, and rarely giving a detailed description of objective things and specific time. Free and easy temperament, independent personality, and strong emotions that are easy to touch and erupt form the distinctive characteristics of Li Bai's lyric style. Once his feelings are aroused, he rushes out without restraint, just like the hurricane in the sky and the overflowing volcano. His imagination is strange, often with unusual connections, and changes with the flow of emotions.
Li Bai's poetic style is romantic and all-embracing. He inherits the poetic revolution and destiny advocated by Chen Ziang, and opposes the form, style, subjectivity and righteousness since the Qi and Liang Dynasties, thus sweeping away the weak and luxurious style of writing since the Southern Dynasties. No matter in content or form, Tang poetry has been creatively developed. Li Shifu's personality has a strong subjective expression of color, and his content shows contempt for vulgarity, resistance and disobedience, flattery, power, and expensive rebellion, rebellion, precision, and spirit, praising the ranger and seeking immortality, and is known as the "poetic fairy".
Li's poems are rich in imagination, peculiar in structure, extremely exaggerated, vivid in metaphor and full of myths and legends.
Li's poems sing magnificent nature, and are good at describing and singing the mountains and rivers of the motherland. He is bold and unrestrained, and disdains subtle carving and dual arrangement. Instead, he uses bold and unpredictable techniques and lines to scribble impressions and feelings in his mind, creating a vivid image of art and an incomparable style.
Li Bai is good at using the language of Yuefu folk songs, rarely carving, and is natural and frank. The use of Yuefu spirit and folk song language has reached an extremely mature and liberated stage.
Li Bai is good at many poetic genres, and he has left masterpieces in many genres.