2.Geckos are able to walk up walls and across ceilings because of
(A)the numerous setae on their toes establish molecular bonds with the surfaces of walls and ceilings.
(B)the sticky adhesive secretions on their feet.
(C) the little suction cups on their toes.
(D)the sticky saliva licked onto the regions where the gecko is about to walk.
(E)their sharp toenails that grasp surfaces.

答案：登入後查看
統計： 尚無統計資料

詳解 (共 1 筆)

#6540954

壁虎（geckos）能夠攀牆走天花板的原因，是因為它們腳趾上有非常多細小的絨毛（setae），而這些絨毛與表面產生「分子間作用力（van der Waals forces）」。Setae（剛毛），每條seta又分岔成數百條更細的spatula（扁平末端），這些結構讓壁虎的腳能夠緊貼表面並在極短距離內產生分子間吸引力。

0
0