2．Some plants get so hungry that they eat flies，spiders，and even small frogs．What's more amazing is that these plants occur naturally （in special environments） in every state．In fact，they're found on every continent except Antarctica．
You've probably seen a Venus'flytrap．It's often sold in museum gift stores，department stores，and even supermarkets．A small plant，it grows 6to 8inches tall in a container．At the end of its stalks （茎） are specially modified leaves that act like traps．Inside each trap is a lining of tiny trigger （触发） hairs．When an insect lands on them，the trap suddenly shuts．Over the course of a week or so，the plant feeds on its catch．
The Venus'flytrap is just one of more than 500species of meat-eating plants，says Barry Meyers-Rice，the editor of the International Carnivorous （ 食肉的 ） Plant Society's Newsletter．Note：Despite any science-fiction stories you might have read，no meat-eating plant does any danger to humans．
Dr．Meyers-Rice says a plant is meat-eating，only if it does all four of the following："attract，kill，digest，and absorb"some form of insects，including flies，butterflies，and moths．Meat-eating plants look and act like other green plants---well，most of the time．
All green plants make sugar through a process called photosynthesis （光合作用）．Plants use the sugar to make food．What makes"meat-eating"plants different is their bug-catching leaves．They need insects for one reason：nitrogen （氮）．Nitrogen is a nutrient that they can't obtain any other way．While almost all green plants on our planet get nitrogen from the soil，"meat-eating"plants can't．They live in places where nutrients are hard or almost impossible to get from the soil because of its acidity．So they've come to rely on getting nitrogen from insects and small animals．In fact，nutrient-rich soil is poisonous to"meat-eating"plants．Never fertilize them!But don't worry，either，if they never seem to catch any insects．They can survive，but they'll grow very slowly．
66．According to the passage，carnivorous plantsD．
A．only grow in wild field
B．are rare to see
C．are as common as flies
D．cannot grow on Antarctica
67．Venus'flytrap preys on insects byC．
A．its numerous long and thin stalks
B．a container where it grows
C．its insect-catching leaves
D．the lining of tiny trigger hairs
68．We can conclude from the third paragraph thatD．
A．carnivorous plants are dangerous
B．carnivorous plants are fictional
C．carnivorous plants occasionally eat books
D．carnivorous plants are harmless to humans
69．In the eyes of the author，which of the following statements is TRUE？B
A．Carnivorous plants cannot grow in acid soil．
B．Carnivorous plants can grow in nutrient-poor soil．
C．Carnivorous plants will die if they cannot catch any insects．
D．Carnivorous plants can get nitrogen from nutrient-rich soil．
分析 本文属于说明文阅读，作者通过这篇文章向我们介绍了食肉植物，人们一直认为食肉植物对人类是有害的，但是作者在文章中阐述了食肉植物对人类是没有任何危险的，而且食肉植物可以在营养贫瘠的土壤中生长．
解答 66．D 细节理解题．根据第一段Some plants get so hungry that they eat flies，spiders，and even small frogs．What's more amazing is that these plants occur naturally （in special environments） in every state．In fact，they're found on every continent except Antarctica．可知食肉植物不能在南极洲生长，故选D．
67．C 细节理解题．根据第二段At the end of its stalks（茎）are specially modified leaves that act like traps．Inside each trap is a lining of tiny trigger（触发） hairs．When an insect lands on them，the trap suddenly shut．可知捕蝇草是用它茎端特别改装的像陷阱一样的叶子捕食昆虫，故选C．
68．D 推理判断题，根据第三段Note：Despite any science-fiction stories you might have read，no meat-eating plant does any danger to humans．可知食肉植物对人类没有任何的危险，故选D．
69．B 推理判断题．根据最后一段They live in places where nutrients are hard or almost impossible to get from the soil because of its acidity（酸度）．可知食肉植物可以在营养贫瘠的土壤中生长，故选B．
点评 考查学生的细节理解和推理判断能力．做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确选择．在做推理判断题时不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．
