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[主观题]

Common indoor plants may prove to be a valuable weapon in the fight against rising levels

of indoor air pollution. Those【C1】______in your office or home are not only【C2】______, but NASA scientists are finding them to be【C3】______Useful in absorbing potentially harmful【C4】______and cleaning the air inside modern buildings.

NASA and the Associated Landscape Contractors of America(ALCA)have【C5】______the findings of a 2-year study that【C6】______the common indoor plant may provide a natural way of helping【C7】______"Sick Building Syndrome."

Research【C8】______the use of biological processes as a means of solving environmental problems, both on the【C9】______and in space habitats(栖息地), has been【C10】______out for many years by Dr. Bill Wolverton,【C11】______a senior research scientist at NASA's John C. Stennis Space Center, Bay St. Louis, Miss.

Based on preliminary evaluations of the use of common indoor plants for indoor air purification and revitalization(恢复活力), ALCA【C12】______NASA to fund a study using about a dozen popular varieties of ornamental plants to determine their【C13】______in removing several key pollutants associated with indoor air pollution. NASA research on indoor plants has found that living plants are so【C14】______at absorbing contaminants in the air that some will be launched into【C15】______as part of the biological life support system aboard future orbiting space stations.

【C16】______research is needed, Wolverton says the study has shown that common indoor landscaping plants can remove【C17】______pollutants from the indoor environment. "We feel that future results will provide an even【C18】______argument that common indoor landscaping plants can be a very effective part of a system used to provide pollution【C19】______homes and work places," he【C20】______.

【C1】

A．offices

B．plants

C．ways

D．homes

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更多“Common indoor plants may prove…”相关的问题

第1题

Container gardening is especially adapted to present living. Plants in containers show gre

at variety of form. and texture. They can be used to create instant indoor gardens; they can be moved from one home to another; and they can be moved outdoors in the summer and indoors during the cooler months.

Space is not a problem. Container gardening can be conducted in a single pot on a table or window sill, in a more elaborate room divider, or in a built-in planter.

Just as there are many kinds of plants, there are many kinds of containers. Plants can be grown in any container that will hold a growing medium. The choice ranges from the common clay pot to cans, jars, boxes, baskets and tubs.

Most people select containers for both their practical and "esthetic qualities". These include cost, availability, weight, strength, durability, attractiveness and sentimental value.

The size and shape of the container should depend on the plant's size and shape. Tall, tapering plants are more attractive in tall, relatively narrow containers. Short, compact plants appear more at home in shallow, wide containers.

Particularly important considerations for good plant growth are the volume and depth of the container, and some provision for drainage. Containers that have drainage holes in the bottom for the removal of excess water are best. Water-right containers are difficult to manage--excess water will accumulate at the bottom of the container and injure plant roots by excluding oxygen.

Container volume and depth become important in relation to the quantity of available water and nutrients.

Besides the right kind of container, some basic requirements for plant growth must be provided. Plants need light, water, nutrients, and a satisfactory temperature ranges.

Light is the most critical requirement. The levels of all the other requirements are regulated in relation to the amount of light that plants receive. When plants don't have enough light they become tall and thin. Plants are easier to maintain in good condition when their light requirements are met.

This article is primarily about ______.

A．growing indoor plants

B．growing tropical plants

C．making containers for plants

D．choosing appropriate containers for indoor plants

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第2题

听力原文：A: You know, I love these container gardening and I think it is especially adapte

d to contemporary living. Plants in containers display great variety of form. and texture. They can be used to create instant indoor gardens;

they can be moved from one home to another; and they can be moved outdoors in the summer and indoors

during the cooler months.

B: Woo, that's wonderful. Besides the space is not a problem. Container gardening can be conducted in a single pot on a table or windowsill, in a more elaborate room divider, or in a built-in planter.

A: But there are so many kinds of containers and I have no ideas how to chose from them, you know, there are common clay pot to cans ,jars, boxes, baskets and tubs.

B: I hear most people select containers for both their practical and esthetic qualities. These include cost, availability, weight, strength, durability, attractiveness, and decorative and sentimental value. What's more, the size and shape of the container should be consistent with the plant's size and shape. Tail, tapering plants are more attractive in tall, relatively narrow containers. Short, compact plants appear more at home in shallow wide containers.

A: Yes, you are right. And I think those containers must have those holes in the bottom for removal of excess water are best. Water-tight containers arc difficult' to manage; excess water will accumulate at the bottom of the container and injure plant roots by excluding oxygen.

B: Those are the fundamental requirements for plant growth, but plants need light, water, nutrients and a satisfactory temperature range.

A: Yes, light is the most critical requirement. The levels of all the other requirements are adjusted in relation to the amount of light that plants receive. When plants don't have enough light, they grow slowly and become tall and thin; it becomes difficult to avoid over-watering them. Plants are easier to maintain in good condition when their light requirements are met.

What does the article mainly discuss？

A．Things plants need to grow

B．Things that are bad for plant growing.

C．How to grow plants in containers.

D．The advantages of growing plants in containers.

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第3题

According to the passage, it is true that ______.A．vegetables are easier to grow than flow

According to the passage, it is true that ______.

A．vegetables are easier to grow than flowering plants

B．the growth of indoor plants can be adjusted by adequate light and temperature

C．most indoor plants live from three to five years

D．plants growing indoors need little care

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第4题

听力原文：W: Excuse me, where can I find indoor plants？M: In the Gardon Shop on the second

听力原文：W: Excuse me, where can I find indoor plants？

M: In the Gardon Shop on the second floor. Just take the right stairs.

Q: Where should the woman go？

(4)

A．To the left stairs.

B．To the third floor.

C．To the indoor shop.

D．To the second floor.

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第5题

For convenience it is common to speak of plants as "herbs," "shrubs," and "trees," but it

is really no sharp distinctions among them.

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第6题

（Passage 3, Lines 4-5, Para. 2)... we find that we have to deal with things like cl

(Passage 3, Lines 4-5, Para. 2)

... we find that we have to deal with things like climate, soil, plants, and such-like factors common to all biological situations;

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第7题

When in Australia recently, I visited a eucalyptus forest that was once the scene of an

appalling wildfire. Perhaps naively, I had expected to find that many trees had been killed .They hadn’t. They had blackened bark, but were otherwise looking rather well, many of them wreathed in new young leaves. This prompted me to consider fire and the role it plays as a force of nature.

Fossil charcoals tell us that wildfires have been part of life on the earth for as long as there have been plants on land. Fire was here long before such plants as grasses; it predated the first flowers. And without wanting to get mystical about it, fire is ,in many respects , a kind of animal, albeit an ethereal one .Like any animal, it consumes oxygen .Like a sheep, it eats plants. Sometimes, it merely nibbles a few leaves; sometimes it kills grown trees. Sometimes it is more deadly and destructive than a swarm of locusts.

The shape-shifting nature of fire makes it hard to study. Some fires are infernally hot; others, relatively cool. Some stay at ground level; others climb trees. Moreover, fire is much more likely to appear in some parts of the world than in others. Satellite images of the earth show that wildfires are rare in, say, Northern Europe, and common in parts of Central Africa and Australia.

Once a fire gets started, many factors contribute to how it will behave. The weather obviously has a huge effect: winds can fan flames, rains can quench them. The lie of the land matters, too: fire runs uphill more readily than it goes down. But another crucial factor is what type of plants the fire has to eat.

It’s common knowledge that plants regularly exposed to fire tend to have features that help them cope with it, such as thick bark, or seeds that only grow after being exposed to intense heat or smoke.

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第8题

Understanding how nature reacts to climate （气候) changewill require checking key, life cy

Understanding how nature reacts to climate (气候) changewill require checking key, life cycleevents-flowering, the appearance of leaves, the first frog calls of the spring-all around theworld. But ecologists (生态学家) cant be everywhere, so theyre turning to non-scientists, some-times called citizen scientists, for help. A group of scientists and educators set up an organization last year called the National Phenology Network. "Pbenology" is what scientists call the study of the timing of events in nature. One of the groups first efforts is to ask scientists and non-scientists to collect information aboutplant flowering and leafing every year. The program, called Project BudBurst, collects life cycleinformation on a variety of common plants from across the United States. People taking part in theproject record their information on the Project BudBurst website. "People dont have to be scientists-they just have to look around and see whats in theirneighbourhood," says Jennifer Schwartz, a scientist with the project. "As we collect this information, well be able to know about the changes of plants and animals as the climate changes." Not only that, the information also helps scientists learn about how these changes will have aneffect on people, scientists examining lilac (丁香花) flowering in western United States reportedthat in years when lilacs flowered early--before May 20th-wildfires later in the summer and fallwere likely to be larger and more serious. Lilac flowering, then, could serve as an alarm bell. "The best way for us to increase our knowledge of how plants and animals are reacting toclimate change is to increase the count of information we have," Schwartz says. "Thats why weneed citizen scientists to get as much information from as many places on as many plants and animals over as long a time period as we can. 根据材料请回答下列各 Project Budburst aims to_________

A.study animal behavior. all year round

B.invite citizen scientists to do scientific research

C.collect information on the life cycles of common plants

D.help ecologists learn about wildfires in western United States

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第9题

听力原文：W: Hi, Tom.M: Judy, I haven't seen you in weeks. Where have you been？W: In Florid

听力原文：W: Hi, Tom.

M: Judy, I haven't seen you in weeks. Where have you been？

W: In Florida.

M: What, vacationing while the rest of us have been studying on campus in the February cold.

W: Not exactly, I spent most of my time underwater.

M: I don't understand.

W: I was on a special field trip. I went with my marine biology class.

M: So you went diving. What were you looking for, sunken treasure？

W: You might say that. The sea is full of treasures, all kinds of strange fascinating organisms. Our class concentrated on studying plankton.

M: I thought plankton was too small to be seen.

W: That's a common misconception. The term Plankton covers a wide variety of freely floating plants and animals from microscopic one-celled organisms to large ones such as the common jellyfish.

M: Jellyfish may be large enough to be seen, but they are transparent, aren't they？

W: Yes, most plankton have transparent tissues as a protective cover-up. It makes them practically invisible to predators.

M: But not invisible to your biology class, I hype.

W: By concentrating, I was able to see the outlines of lots of different plankton, plants and animals. In fact, our professor even took photographs of small oceanic snails.

M: That sounds like an interesting trip. But I think if I'd been in Florida in February, I'd much rather spend my time just swimming and lying in the sun.

How did Judy spend most of her time in Florida？

(20)

A．Sightseeing.

B．Taking photographs.

C．Enjoying sunshine.

D．Diving.

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第10题

We tend to think of plants as the furniture of the natural world. They dont move, they don

t make sounds, they dont seem to respond to nothing—at least not very quickly. But as is often the case, our human view of the world misses quite a lot. Plants talk to each other all the time. And the language is chemical. Over the years, scientists have reported that different types of plants, from trees to tomatoes, release compounds into the air to help neighboring plants. These chemical warnings all have the same purpose—to spread information about one plants disease so other plants can defend themselves. But exactly how plants receive and act on many of these signals is still mysterious. In this weeks Proceedings of the National Academy of Sciences, researchers in Japan offer some explanations. They have identified one chemical message and traced it all the way from release to action. The scientists looked at tomato plants infested(侵害)by common pest, the cutworm caterpillar(毛虫). To start out, they grew plants in two plastic compartments connected by a tube. One plant was infested and placed upwind and the others were uninfested and placed downwind. The downwind plants were later exposed to the cutworm caterpillar. The results showed that plants that had previously been near sick neighbors were able to defend themselves better against the caterpillar. The researchers also studied leaves from exposed and unexposed plants. They found one compound showed up more often in the exposed plants. The substance is called HexVic. When the scientists fed HexVic to cutworms, it knocked down their survival rate by 17%. The scientists identified the source of Hex Vic, and sprayed it lightly over healthy plants. Those plants were then able to start producing the caterpillar-killing Hex Vic. Researchers confirmed that uninfested plants have to build their own weapon to fight off bugs and diseases. How do they know when to play defense？ They are warned first by their friendly plant neighbors. It is a complex tale, and it may be happening in more plant species than tomatoes. It may also be happening with more chemical signals that are still unknown to us. For now though, we know that plants not only communicate, they look out for one another.

What does the author try to emphasize in Paragraph 1？

A．How plants communicate is still a mystery.

B．Enough attention has been paid to plant talk.

C．Plants are the furniture of the natural world.

D．Plants can communicate with each other.

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