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 （莖） 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．a(chǎn)ll 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．a(chǎn)nd 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 本文屬于科教類說明文，作者通過這篇文章向我們介紹了食肉植物，這類植物生活在除了南極洲以外的世界各地；因?yàn)闊o法從土壤中獲取營(yíng)養(yǎng)，它們需要捕食昆蟲以獲得氮；因?yàn)榭苹眯≌f的描寫使 人們誤認(rèn)為食肉植物對(duì)人類是有害的，但是作者在文章中闡述了食肉植物對(duì)人類是沒有任何危險(xiǎn)的，而且食肉植物可以在營(yíng)養(yǎng)貧瘠的土壤中生長(zhǎng)，不過長(zhǎng)得慢．

解答 64．答案是C．細(xì)節(jié)理解題；從第二段的句子"When an insect lands on them，the traps suddenly shut．Over the course of a week or so，the plant feeds on its catch．（當(dāng)昆蟲落在它們上面時(shí)，陷阱突然關(guān)閉．在大約一周的時(shí)間里，這個(gè)植物就以此為食．）"可知 Venus'flytrap可以捕捉吃一些昆蟲，故選C．
65．答案是C．推理題；從第三段的句子"He states although you might have read some science-fiction stories，no meat-eating plant does any danger to humans．（他說雖然你也許看過科幻小說，沒有肉食植物對(duì)人有危害．）"可知科幻小說中食肉的植物對(duì)人有害．故選C．
66．答案是B．推理題；從最后一段的句子"So they've come to rely on getting nitrogen from insects and small animals．（因此它們--肉食植物--依賴來自昆蟲和小動(dòng)物的營(yíng)養(yǎng)．）"和"if they never seem to catch any insects．They can survive，but they'll grow very slowly．（如果它們捉不到昆蟲，它們能夠存活，但是生長(zhǎng)緩慢．）"可知食肉動(dòng)物是通過吃昆蟲獲得氮，如果不能吃昆蟲，就會(huì)生長(zhǎng)緩慢．選B．
67．答案是C．推理題；從第五段的句子：What makes meat-eating plants different is their special leaves，which need insects for one reason：nitrogen （氮）．可以推斷出The Venus'flytrap 吃蒼蠅是為了得到氮，故選C．

點(diǎn)評(píng) 考查學(xué)生的細(xì)節(jié)理解和推理判斷能力．做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確選擇．在做推理判斷題時(shí)不要以個(gè)人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．