問題詳情
8. 「很多人怕打針,因為打針會痛。科學家探究人被蚊子叮卻不感到痛的原理,結果發現關鍵在於尺寸和圓錐的形狀—因為蚊子_______ 。以前大家以為針的內徑和外徑必須維持一致,藥劑才能滲透,同時認為尖端的直徑縮小會比較難注射,才限制了針頭尖端的縮小程度。然而圓柱狀的針頭正是導致注射疼病的原因。」根據文意,畫線處填入下列何者最恰當?
(A)體形輕巧,叮咬時人們不易發覺
(B)叮咬的動作迅速,人們反應不及
(C)長嘴前端較細,後端逐漸變粗
(D)圓錐形的長嘴內含有麻醉液體
(A)體形輕巧,叮咬時人們不易發覺
(B)叮咬的動作迅速,人們反應不及
(C)長嘴前端較細,後端逐漸變粗
(D)圓錐形的長嘴內含有麻醉液體
參考答案
答案:C
難度:簡單0.857143
統計:A(1),B(0),C(6),D(0),E(0)
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