5.Next fall when you see geese heading south for the winter or flying in"V"formation (隊形),you might consider what science has discovered as to why they fly that way.
As each bird spreads its wings,it creates an uplift (上升力) for bird immediately following.By flying in"V"formation the whole flock (鳥群) adds at least 71% greater flying range,than if each bird flies on its own.People who share a common direction arid sense of community can get where they are going more quickly and easily because they are traveling on the thrust (推動力) of one another.
When a goose falls out of the formation,it suddenly feels the drag and resistance of trying to go it alone and quickly gets back into formation to take advantage of the lifting power of the bird in front.If we have as much sense as a goose,we will stay in formation with those who are headed the same way we are.When the head goose gets tired,it flies backwards and another goose flies point.It is sensible to take turns doing demanding jobs,whether it is with people or with geese flying south.
Geese honk (雁叫) from behind to encourage those up front to keep up their speed.What do we say when we honk from behind?
Finally and this is important,when a goose gets sick or is wounded by gunshots,and falls out of formation,two other geese fall out with that goose and follow it down to lend help and protection.They stay with the fallen goose until it is able to fly or until it dies,and only then do they launch out on their own,or with another formation to catch up with their group.If we have the sense of a goose,we will stand by each other like that.
25.The first three paragraphs chiefly deal withC.
A.scientific discovery about geese.
B.the importance of flight formation.
C.the advantages of"V"formation.
D.the reasons for geese's flight.
26.The phrase which can best replace"stand by"in the last sentence is"B".
A.be against.B.support.C.sit by.D.obey.
27.What does the author want us to learn from the geese?A
A.Teamwork.B.Sympathy.C.Kindness.D.Intelligence.
分析 本文是一篇說明文.介紹了大雁南飛習(xí)慣排成V字行隊伍,關(guān)于這個課題,科學(xué)家作了調(diào)查研究,發(fā)現(xiàn)大雁的飛行方向與其群體感和群體方向有關(guān).
解答 25.C 段落大意題.根據(jù)第二段People who share a common direction arid sense of community can get where they are going more quickly and easily because they are traveling on the thrust (推動力) of one another可知前三段主要論述大雁V字形飛行的優(yōu)勢;故選C.
26.B 詞義猜測題.根據(jù)最后一段If we have the sense of a goose,we will stand by each other like that可知如果我們有意識的鵝,我們將站著像對方一樣;意為支持;故選B.
27.A 推理判斷題.根據(jù)文章They stay with the fallen goose until it is able to fly or until it dies,and only then do they launch out on their own,or with another formation to catch up with their group可知作者希望我們從大雁身上學(xué)到團隊合作;故選A.
點評 考察學(xué)生的細節(jié)理解和推理判斷能力,做細節(jié)理解題時一定要找到文章中的原句,和題干進行比較,再做出正確的選擇.在做推理判斷題不要以個人的主觀想象代替文章的事實,要根據(jù)文章事實進行合乎邏輯的推理判斷.