题目内容
The nutrients in falls into the ocean will quickly become available to other living creatures.
A．whichever B．hat C．whatever D．wherever
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.
【小题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 |
| 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 |
| 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 |
| 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. |
How to eat healthfully can be especially complex for working women who often have neither the desire nor the time to cook for themselves (or for anyone else )．Registered dietitian Barbara Morrissey suggests that a few simple rules can help.
“Go for nutrient－dense foods，”she suggests，“foods that contain a multiple of nutrients. For example，select whole wheat bread as a breakfast food，rather than coffee cake. Or drink orange juice rather than orange drink，which contains only a small percentage of real juice—the rest is largely colored sugar water. You just can't compare the value of these foods, the nutrient－dense ones are so superior，”she emphasizes.
Morrissey believes that variety is not only the spice of life，it's the foundation of a healthful diet. Diets which are based on one or two foods are not only almost impossible to keep up the strength，they can be very harmful, she says, because nutrients aren't supplied in enough amounts or balance.
According to Morrissey，trying to find a diet that can cure your illnesses，or make you superwoman is a fruitless search.“ As women，many of us are too concerned with staying thin，”she says，and “we believe that vitamins are some kind of magic cure to replace food.”
“We need carbohydrates，protein and fat－they are like the wood in the fireplace. The vitamins and minerals are like the match，the spark，for the fuel，”she explains.“ We need them all，but in a very different proportions（部分）. And if the fuel isn't there，the spark is useless.”
【小题1】From the first paragraph we know that working women________.
| A．think cooking is especially complicated |
| B．do not share the same views with registered dietitians |
| C．are busy and not interested in cooking |
| D．are likely to eat healthfully |
| A．it contains only a small percentage of real juice |
| B．it is natural，nutritious and prepared from real oranges |
| C．it is largely orange－colored sugar water |
| D．it produces nothing but calories |
| A．an effort with no results |
| B．a search for a diet without fruits |
| C．a research on fruitless diet |
| D．a diet serving as medicine |
| A．a balanced diet can result in being fat |
| B．staying thin and healthy are both possible |
| C．lack of variety in diets leads to staying thin |
| D．vitamins are some kind of substitutions（代替物）for food |
| A．carbohydrates，protein and fat are enough to support a human life |
| B．vitamins and minerals are almost of no value |
| C．carbohydrates，protein and fat are as important as vitamins and minerals |
| D．without carbohydrates，protein and fat，vitamins and minerals are of no use |