Question

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.

1.According to the passage, a Venus' flytrap ______.

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

2.From the passage, we can infer that ______.

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

3.Meat-eating plants grow very slowly, ______.

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

4.Which of the following is true?

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

【答案】

1.C

2.C

3.B

4.C

【解析】

试题分析：文章介绍了食肉植物是如何吃昆虫的，它们的生活习性，以及和绿色植物的差别是什么。

1.细节题：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.可知 Venus' flytrap可以捕捉吃一些昆虫。选C

2.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.可知科幻小说中食肉的植物对人有害。选C

3.推理题;从最后一段的句子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.和if they never seem to catch any insects. They can survive, but they'll grow very slowly.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

4.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 吃苍蝇是为了得到营养。选C

考点：考查科普类短文

点评：这篇阅读理解集中考查了推理题，要求考生仔细阅读全文，做好相应的标志，以提高阅读的效率和速度，做题时要审清题干，发觉和把握试题中有效的提示性信息，确认命题的角度、阅读范围和答题方式。进行合理的推理判断。