还剩4页未读,继续阅读
文本内容:
2019-2020年高中英语阅读理解第四部分动物世界
(三)练习“飞蛾扑火”是句成语那么飞蛾为何这样呢?这原来是昆虫的一种趋光性本能表现蛾子飞近灯光后,它的两只睛眼离光源的远近不同,一只眼睛比另一只眼睛感受到的光线强,它们不停地拐向光线更强的方向,这样,它们就总是绕着圈子,盘旋着向灯光飞HaveyoueverwonderedwhyyouseemothsflyingmostlyatnightandthenonlyaroundlightsIt’sclearthatmothsareattractedtolight.ButwhatdoyousupposethelightdoestothemHere’sthecorrectanswer.Amoth’snervoussystemisextremelysensitivetolight.Itisbelievedthatlightcausesamothtoreduceitsmovements.Atnightlighthittingonesideofthemothissensedbythemoth’seyesstimulatingthenervoussystem.Thisproducesareflectionthatreduceswingmovementsonthesidefacingthelight.Whenthewingsonthatsideslowdowntheunevenwingbeatturnstheothersideofthemothtothelight.Inthiswaythemothiscontinuallyturningnearalight.Duringdaylighthourslightismuchstrongerandmoredirectcausingthemothtoremainmotionless.prehensionQuestions:
1.Whatsthemainideaofthep...。