oracle 資料庫優化-鬆森科技
- 第一步
檢查用於造絲編網的器官。蜘蛛的腹部是一個用蛋白質來製造液體絲綢的器官。每個蜘蛛有1到4對穿孔管腺體,這被稱為吐絲器。蜘蛛將液體絲綢
- 第二步
觀察蜘蛛是如何開始織網。它發出一縷粘絲並期望隨風而動。當它掠過一些物理或棍子時,蜘蛛開始沿著之前的絲往返編織,直到絲足夠結實以支撐整個網。
- 第三步
Notice the meticulous system a spider uses to spin its web. After securing the primary thread, it weaves radials around the central point. The spider may use non-sticky thread for this or oils its legs with a substance from its mouth so it doesn't stick to its own web. The spider continues to spin several circular trails around the radials and then finishes the web from the outside working in.
Study the silks used by the spider for its various purposes. The web itself isn't usually a sticky silk, but the thread it uses to catch and wrap its prey is very sticky. It uses a different type of silk to make a cocoon for its eggs. If a widely held belief is true, a rope of spider silk 1-inch thick could support a weight of 84,000 tons.
Learn to recognize the different types of spider webs. One kind is the orb web, which is oval in shape. Funnel webs are usually on the ground, spun on long grasses or other supports. There are tangle webs (what we call cobwebs), tubular webs and sheet webs. A different type of spider makes each kind, and the structure varies with the purpose of the web.