The diagram shows the life cycle of silkworms and the process of making silk cloth.
The life cycle is divided into several particular developing stages. It starts when a moth produces her eggs on the mulberry leaves. After ten days the eggs grow into silkworm larva, whose foods are the mulberry leaf. The second stage ends. In the following four to six weeks, the larva will generate silk threats which cover the larva. This is the third stage. The fourth stage lasts for three or eight days during which cocoon is formed. 16 days after the formation of the cocoon, a moth finally comes out of the cocoon. A new cycle starts.
The production of the silk cloth consists of numerous steps. The first is to select cocoons, which then are heated in boiled water. After the heat treatment, the cocoon is ready to be decomposed into threads ranging from 300 to 900 meters in length. The second is to twist the thread together. To dye is the third. After this process, silk cloth is woven.
儿童英语歌谣--蔬菜名称
小学英语歌曲 Eye rhymes
小学趣味英语歌谣 one little finger
英语歌谣 手指歌
北师大一年级英语上册歌谣
英文歌曲 To All The Girls
儿童英语歌谣---动物名称
小学英语歌曲 What’s this?
少儿英语歌曲:颜色名称
If your're happy
小学英语歌曲 We wish you a merry chirstmas
我们祝你圣诞快乐歌词
小学英语歌曲 铃儿响叮当
儿童英语歌曲:twinkle,twinkle,little star
英语歌谣 Home Town
少儿英语歌谣 All Night All Day
小学英语歌曲 火腿和鸡蛋
少儿英语歌谣 ABC(字母歌)
小学英语歌谣及动作
儿童英语歌曲:It’s Raining,It’s Pouring
英语歌谣 衣服篇
儿童英语歌曲 Cuckoo!
少儿英语歌曲 Cuckoo!
小学英语歌曲 家庭人物称呼
幼儿英语启蒙儿歌02
儿童英语歌谣01
儿童英语歌谣--树木名称
幼儿英语启蒙儿歌01
儿童英语歌谣 All the Pretty Little Horses
小学英语歌谣 音乐类名称
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