题目内容
14.Scientists have always been interested in the high level of organization in ant societies.American researchers have watched ants build life-saving rafts (筏子) to keep afloat during floods.They also have documented how ant colonies choose their next queen----the female whose job is to produce eggs.New technology is helping to improve researchers'understanding of the insects.But there is still a lot to be learned.
Fire ants living in Brazilian forests are perfectly at home in an environment where flooding is common.To save themselves,the insects connect their legs together and create floating rafts.Some ant rafts can be up to 20centimeters wide.
David Hu who is a mechanical engineer with the Georgia Institute of Technology,also known as Georgia Tech,says,"If you have 100ants,which means 600legs,99percent of those legs will be connected to a neighbor.So they're very,very good at maintaining this network."
David Hu and other Georgia Tech researchers wanted to study ants and the secret of their engineering.They froze ant rafts and then look at them with the help of computed technology,or CT,images.The pictures showed that larger ants serve in central positions to which smaller ants hold.The larger ants form pockets of air that keep the insects afloat.
Scientists say small robots or materials that can change shape could be programmed in a similar way,working towards a shared goal.
Researchers at North Carolina State University are also studying ants.They examined how Indian jumping ants choose the leader of the colony when they lose their top female or queen.Researcher Clint Penick says all the worker ants in the colony are females.His team found that the worker ants start a series of competitions or battles and that some workers become physically larger.
32.The duty of the queen ants is toD.
A.build rafts B.keep organized
C.keep guard D.lay eggs
33.The author takes fire ants as an example to tell usD.
A.how ants seek food perfectly
B.how ants connect their legs together
C.how ants communicate with each other
D.how ants save themselves from floods
34.Which of the following is true according to the passage?C
A.Ants know the way to form a harmonious society.
B.The Georgia Tech researchers first discovered Indian jumping ants.
C.Small and shape-changeable things might work just like ants do.
D.All the worker ants in the colony are physically larger.
35.What's the best title of the passage?A
A.Ants'Ability to Organize
B.Ants'Living Environment
C.The Life-saving Rafts of ants
D.The Election of the Queen Ant.
分析 本文为一篇说明文,主要告诉我们蚂蚁是如何生存和自救,以及如何选择自己的领袖的.
解答 32.D 细节理解题.根据第一段最后一句中的"…the female whose job is to produce eggs."可知,蚁后的主要职责是负责产卵.故选D.
33.D 细节理解题.根据第三段内容Fire ants living in Brazilian forests are perfectly at home in an environment where flooding is common.To save themselves,the insects connect their legs together and create floating rafts.Some ant rafts can be up to 20 centimeters wide.可知,本段主要介绍了巴西森林里的火蚁在洪水中的自救方式.故选D.
34.C 推理判断题.根据第六段内容可知.选项A文中没有提及;根据最后一段第一句和第二句Researchers at North Carolina State University are also studying ants.They examined how Indian jumping ants choose the leader of the colony when they lose their top female or queen.可知B项错误;根据最后一段最后一句"…some workers became physically larger."可知D项错误.故选C.
35.A 主旨大意题. 根据第一段第一句Scientists have always been interested in the high level of organization in ant societies.可知.且整个篇章围绕第一段展开,再结合题中选项,故选A.
点评 考点:本文考察学生的说明文阅读理解,抓住题干中的关键词,采用寻读的方法查找细节,回答对应的题目,并能根据文章进行合理的推断.