In the Arizona desert, tomatoes hang
from ceilings, spinach grows without soil and shrimp lire in indoor pools.
What’s going on.’ Food research!
People perform these
experiments to learn how to produce more food. There will be over 6.5 bil- lion
people on earth after two decades. We will have to produce four times as much
food as we do now to feed all these people. But each year there is less fresh
water, the soil loses nutrients and buildings take up more land. We must learn
to use resources we have always thought unusable. So, the Environ- mental
Research Laboratory in Arizona tries to grow food without soil, in the desert,
and with salt water.
So far the results have been excellent. The
new methods yield twenty times more tomatoes and cu-cumbers than can be grown on
a farm. About sixty times as many shrimp can be raised
A. new ways to grow spinach
B. the population explosion
C. research to produce more food
D. desert farming
更多"Passage Four
In the Arizo"的相关试题:
[单项选择] Passage Four
In the Arizona desert, tomatoes hang
from ceilings, spinach grows without soil and shrimp lire in indoor pools.
What’s going on.’ Food research!
People perform these
experiments to learn how to produce more food. There will be over 6.5 bil- lion
people on earth after two decades. We will have to produce four times as much
food as we do now to feed all these people. But each year there is less fresh
water, the soil loses nutrients and buildings take up more land. We must learn
to use resources we have always thought unusable. So, the Environ- mental
Research Laboratory in Arizona tries to grow food without soil, in the desert,
and with salt water.
So far the results have been excellent. The
new methods yield twenty times more tomatoes and cu-cumbers than can be grown on
a farm. About sixty times as many shrimp can be raised
A. people get hungrier every year
B. the population of the world is growing
C. there are too many unemployed farmers
D. people do not like the food now produced
[填空题]This passage deals with four factors that affect people’s demand for certain demanded goods.
[单项选择]
Passage Two
Nearly four years ago, a web-based political movement set itself the modest task of "closing the gap between the world we have and the world most people everywhere want". Calling their group Avaaz, which means "voice" in several languages, the founders aimed to reproduce globally some of the success which their predecessors—like America’s Moveon.org, and Australia’s Getup! —had enjoyed in national political fields.
By its own lights, the movement, using 14 languages and engaged in an astounding list of causes, has had some spectacular successes. Within the next few months, membership will top 6m. The number of individual actions taken is estimated at over 23m. Among the recent developments Avaaz claims to have influenced are a new anti-corruption law in Brazil; a move by Britain to create a marine-conservation zone in the Indian Ocean; and the spiking of a propos
A. A political website has been built four years ago.
B. National politics have been quite enjoyable.
C. Some political campaigns had achieved a lot.
D. Voices in 14 languages has been well aime
[单项选择]Passage Three
Some desert regions get no rainfall for months, and even years. Yet water can be found if you dig deep enough. For a long time this was a puzzling question. Then geologists found the answer. The underground water is rainwater--but the rain fell hundreds of miles away! It soaked into the ground and then flowed underground through a rock sandwich.
A rock sandwich with water in the filling has a scientific name: aquifer. An aquifer is composed of two or more layers of nonporous rock. That’s the bread of the sandwich. The filling is a layer of porous rock or sand. The whole sandwich, or aquifer, is titled at a slant. The higher end is in a region of good rainfall, where the rain soaks into the porous rock or sand. The rainwater flows down at a slant between the nonporous rock layers. If a well is drilled through the top layer, the water flows up into the well.
If the upper end of the aquifer is higher than the top of the well, the water is forc
A. weather patterns
B. boundaries and land claims
C. the surface layers of the earth
D. the orbits of heavenly bodies
[单项选择] Passage Four
What is this passage about
a. The development of computer technonogy.
b. The development of Symantec Corporation.
c. Cyber attacks.
d. Computer techniques.
[单项选择]
Passage Four
Roger lived in the city of London, and his hair was always cut by the same old man. He always cut Roger’s hair as Roger liked it, and while he was doing it, the two men talked about football.
One day, when Roger was sitting in his chair, and his hair was being cut as usual, the old man said to him, "Roger, I’m going to be seventy years old next month and I feel tired, so I’m going to sell my shop to a young man. He liked to cut hair for people."
Roger was sorry to hear that, because he enjoyed talking to the old man, and he was also worried that his hair would not be cut as well by the new young man as it had been for so many years by his old friend.
He went to the shop again the next month, and the new young man was there. He cut Roger’s hair, bu
A. A
B. B
C. C
D. D
[单项选择] Passage Four
Ad. A
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Hawaii
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The resorts are in prime locations with
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A
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each location and convenient to local attractions and recreation.
Our resorts
differ from the Embassy Suites Hotels
A. There is no evening reception at the resorts.
B. There is complimentary breakfast at the resorts.
C. There are no pools in Embassy Suites Hotels.
D. There are comforts of home in Embassy Suites Hotels.
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