最兴旺的家族昆虫是动物界中最大的一个类群,有100多万种,约占动物种类总数的3/4。昆虫分布广泛,从赤道到两极,从海洋到沙漠,从地下到空中,从平原到高山都能找到昆虫的足迹。昆虫,可以认为是始终包围着人们的一类动物。它们在田园里、屋里、床上,在不讲卫生的那些人头上、身上甚至体内都可能有昆虫存在。它们在自然界不仅取食植物的花、果实、种子和根、茎、叶,吃动物的毛、皮、肉乃至骨骼、粪便,有的甚至咬啮人们的食物,药品、塑料和电缆可以说昆虫几乎取食或咬啮包罗万象的各种各样的物品。当然,也有像蜜蜂、蚕等有益昆虫给人类带来食物、原料以及对付害虫。大约3亿年以来,昆虫始终是动物界在进化过程中取得非凡适应能力的一大群小动物它们不仅在种 The most prosperous family of insects is the largest group in the animal kingdom, with more than one million species accounting for approximately three quarters of the total number of animal species. Insects are widely distributed, from the equator to the poles, from the ocean to the desert, from the ground to the air, and from the plains to the mountains. Insects can be considered as a type of animal that always surrounds people. They may have insects in their fields, in their houses, in their beds, on the heads of people who do not care about hygiene, and even on their bodies. They not only eat the flowers, fruits, seeds and roots, stems, and leaves of plants, eat the hair, skins, flesh, bones and excrements of animals, and even bite people’s foods. Medicines, plastics, and cables can be said to be insects in nature. Almost eating or biting all kinds of all-inclusive items. Of course, there are beneficial insects such as bees and silkworms that bring food, raw materials, and pests to humans. For about 300 million years, insects have always been a large group of small animals that have acquired remarkable adaptability in the evolutionary process of animals. They are not only