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(復眼),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(紫外線),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(觸角),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(振動).
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 本文是一篇科教類閱讀,屬于說明文,蝴蝶是世界上最迷人和最美麗的昆蟲之一.成蟲蝴蝶將生活在2至4周左右.他們使用他們的視覺,觸覺,聽覺,嗅覺和味覺在世界上生存,找到食物和伴侶,在適當的地方產卵,遷移,避免饑餓的敵人.本文以此展開,主要介紹了蝴蝶的各種感覺,包括每種感覺器官的功能和作用.
解答 28.C.細節(jié)理解題.根據Butterflies don't have ears.Instead they"hear"sounds through their wings by sensing changes in sound vibrations(振動).可知,蝴蝶用他們的翅膀感覺到聲音的振動來聽取聲音.故選C.
29.B.細節(jié)理解題:題目的意思是"為什么雌蝴蝶仔細選擇植物?"根據第四段的句子:Some females also carefully choose host plants by tasting to find appropriate places to lay their eggs.可知她們是想找一個適當的地方產卵,故選B.
30.B.主旨大意題:題目的意思是"文章主要專注于什么?".在文中第一句話"Butterflies have large compound eyes,which allow them to see in all directions without turning their heads.可以體現出來,說明這篇文章主要講的是蝴蝶的感覺,故選C.
點評 本文是一篇科教類閱讀,題目涉及多道細節(jié)理解題,主旨大意題.做題時學生應仔細閱讀原文,把握文章主要內容,聯系文章上下文內容并結合所給選項含義,從中選出正確答案,一定要做到有理有據,切忌胡亂猜測.