10.Butterflies are some of the most fascinating and beautiful insects in the world.Adult butterflies will live about 2to 4weeks.They use their senses of sight,touch,hearing,smell,and taste to survive in the world,find food and mates,lay eggs in an appropriate place,migrate,and avoid hungry enemies.
Butterflies have large compound eyes(复眼),which allow them to see in all directions without turning their heads.Like most insects,butterflies are very nearsighted,so they are more attracted to a sea of flowers than individual plants.
Butterflies do not"see"colors such as red,green,and yellow,but they can sense sunlight,which indicates the direction the sun is shining,as well as ultraviolet light(紫外线),which is present on many flowers and guides butterflies to honey sources.
Butterflies have a very well-developed sense of smell,but it is not in their nose,since they don't have one.Sense receptors are located in their antennae(触角),feet,and many other parts of the body.They can help butterflies find their favorite flower honey food,and mates.
Butterflies'feet have sense organs that can taste the sugar in flower honey,letting the butterflies know if something is good to eat or not.Some females also carefully choose host plants by tasting to find appropriate places to lay their eggs.Adult butterflies feed their babies using a long tube.Butterflies force blood into the tube to straighten it out,allowing them to feed.Butterflies get all their food from this tube.
Butterflies don't have ears.Instead they"hear"sounds through their wings by sensing changes in sound vibrations(振动).
Butterflies may possess senses we don't even know about yet,because their body structure is very different from ours,and therefore difficult to understand,when observed through our own human senses.
28.How do butterflies hear sounds?C
A.Using their feet to sense the vibration of things
B.Using their ears to listen directly
C.Using their wings to sense the sound vibrations
D.Using their antennae to judge the sound
29.Why do female adult butterflies carefully choose the host plants?B
A.To find high-qualified honey.
B.To find a proper place for their eggs.
C.To make it easier for them to hide from the enemies.
D.To have a good place for living.
30.The text mainly focuses onB.
A.butterflies'living habits
B.butterflies'senses
C.butterflies'daily activities
D.butterflies'beauty.
分析 本文是一篇科教类阅读,属于说明文,蝴蝶是世界上最迷人和最美丽的昆虫之一.成虫蝴蝶将生活在2至4周左右.他们使用他们的视觉,触觉,听觉,嗅觉和味觉在世界上生存,找到食物和伴侣,在适当的地方产卵,迁移,避免饥饿的敌人.本文以此展开,主要介绍了蝴蝶的各种感觉,包括每种感觉器官的功能和作用.
解答 28.C.细节理解题.根据Butterflies don't have ears.Instead they"hear"sounds through their wings by sensing changes in sound vibrations(振动).可知,蝴蝶用他们的翅膀感觉到声音的振动来听取声音.故选C.
29.B.细节理解题:题目的意思是"为什么雌蝴蝶仔细选择植物?"根据第四段的句子:Some females also carefully choose host plants by tasting to find appropriate places to lay their eggs.可知她们是想找一个适当的地方产卵,故选B.
30.B.主旨大意题:题目的意思是"文章主要专注于什么?".在文中第一句话"Butterflies have large compound eyes,which allow them to see in all directions without turning their heads.可以体现出来,说明这篇文章主要讲的是蝴蝶的感觉,故选C.
点评 本文是一篇科教类阅读,题目涉及多道细节理解题,主旨大意题.做题时学生应仔细阅读原文,把握文章主要内容,联系文章上下文内容并结合所给选项含义,从中选出正确答案,一定要做到有理有据,切忌胡乱猜测.