作业帮蜘蛛网第一根丝是怎么拉的
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蜘蛛网第一根丝是怎么拉的
蜘蛛网第一根丝是怎么拉的
蜘蛛网第一根丝是怎么拉的
平拉或者斜拉
The most well known form is the orb web. How is this web constructed?
The most difficult part is the construction of the first thread. This is a sturdy horizontal thread on which the rest of the w...
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The most well known form is the orb web. How is this web constructed?
The most difficult part is the construction of the first thread. This is a sturdy horizontal thread on which the rest of the web is hanging. How does the spider connect this thread between the two connecting points? She can not fly. Does she connect a thread at one place, walk down with an enrolling thread behind her to the other side where pulls the thread horizontal and connects it?
No, the answer is simpler. She makes use of the wind and some luck.
The wind carries a thin adhesive thread released from her spinners while making the thread longer and longer. If she is lucky the thread sticks to a proper spot. Then she walks carefully over the thread, strengthening it with a second thread. This is repeated until the primary thread is strong enough. After this, she hangs a thread in the form of a Y below the primary thread. These are the first three radial of the web.
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是小蜘蛛凌空飞跃拉出的丝吧