Question

10．Some plants get so hungry they eat flies，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--a small plant，which grows 6 to 8 inches tall in a container．At the end of its stalks （茎） are leaves that act like traps （陷阱）．Inside each trap is a lining of tiny hairs．When an insect lands on them，the traps suddenly shut．Over the course of a week or so，the plant feeds on its catch．
The Venus'flytrap is just one of more than 500 species of meat-eating plants，says Barry Meyers-Rice，the editor of the International Carnivorous Plant Society's Newsletter．He states although you might have read some science-fiction stories，no meat-eating plant does any danger to humans．
Barry says a plant is meat-eating，only if it does all four of the following："attract，kill，digest，and absorb"some form of insects．Meat-eating plants look and act like other green plants--well，most of the time．
All green plants make sugar to produce food．What makes meat-eating plants different is their special leaves，which need insects for one reason：nitrogen （氮）．Nitrogen is a nutrient that they can't obtain any other way．Why？
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 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 soft is poisonous to meat-eating plants．Never fertilize （施肥） them!But don't worry，either，if they never seem to catch any insects．They can survive，but they'll grow very slowly．
64．According to the passage，a Venus'flytrapC．
A．is a small plant which grows in a container
B．is a kind of plant which gets hungry easily
C．can trap and feed on some form of insects
D．can only grow 6-8 inches tall
65．From the passage，we can infer thatC．
A．meat-eating plants are found nowhere else except Antarctica
B．all green plants get nitrogen from the soil
C．meat-eating plants endanger humans in science-fiction stories
D．the nutrient-poor soil is beneficial to meat-eating plants
66．Meat-eating plants grow very slowly，B．
A．so you'd better fertilize them
B．probably because the supply of nitrogen is cut off
C．simply because they can't absorb nitrogen from the soil
D．and then they will die slowly
67．Which of the following is true？C
A．Meat-eating plants look and act like other green plants．
B．It's hard to get nutrients in the soil when acidity is high．
C．The Venus'flytrap eats flies to get nutrient from them．
D．Green plants make sugar at night．

Answer 1

分析 本文属于科教类说明文，作者通过这篇文章向我们介绍了食肉植物，这类植物生活在除了南极洲以外的世界各地；因为无法从土壤中获取营养，它们需要捕食昆虫以获得氮；因为科幻小说的描写使 人们误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，不过长得慢．

解答 64．答案是C．细节理解题；从第二段的句子"When an insect lands on them，the traps suddenly shut．Over the course of a week or so，the plant feeds on its catch．（当昆虫落在它们上面时，陷阱突然关闭．在大约一周的时间里，这个植物就以此为食．）"可知 Venus'flytrap可以捕捉吃一些昆虫，故选C．
65．答案是C．推理题；从第三段的句子"He states although you might have read some science-fiction stories，no meat-eating plant does any danger to humans．（他说虽然你也许看过科幻小说，没有肉食植物对人有危害．）"可知科幻小说中食肉的植物对人有害．故选C．
66．答案是B．推理题；从最后一段的句子"So they've come to rely on getting nitrogen from insects and small animals．（因此它们--肉食植物--依赖来自昆虫和小动物的营养．）"和"if they never seem to catch any insects．They can survive，but they'll grow very slowly．（如果它们捉不到昆虫，它们能够存活，但是生长缓慢．）"可知食肉动物是通过吃昆虫获得氮，如果不能吃昆虫，就会生长缓慢．选B．
67．答案是C．推理题；从第五段的句子：What makes meat-eating plants different is their special leaves，which need insects for one reason：nitrogen （氮）．可以推断出The Venus'flytrap 吃苍蝇是为了得到氮，故选C．

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．