___ of this room ___ empty.

A.Two-third, are   B. Two-thirds, are    C.Two-third, is   D.Two-thirds, is

練習冊系列答案
相關(guān)習題

科目:高中英語 來源: 題型:閱讀理解

The volcano is one of the most surprising frightening things of nature. Maybe you have seen pic??tures of these " fireworks " of nature. Sometimes when a volcano erupts, a very large wall of melted rock moves down the side of a mountain. It looks like a " river of fire". Sometimes volcanoes ex??plode, throwing the melted rock and ashes high into the air. But where does this melted rock come from?

The earth is made up of many layers (層). The top layer that we see is called the crust. Under the crust are many layers of hard rock. But far, far beneath the crust the rock is so hot that it is soft. In some places it even melts. The melted rock is called magma. Sometimes the magma breaks out to the surface through cracks (裂縫) in the crust. These cracks are volcanoes.

Most people think of mountains when they think of volcanoes. But not every mountain is a volca??no. A volcano is simply the opening in the earth from which the magma escapes. The hot magma, or lava as it is called, cools and builds up on the surface of the earth. Over thousands of years, this pile of cooled lava can grow to be very, very big. For example, the highest mountain in Africa, Kilimanja??ro, is a volcano. It rises more than 16,000 feet above the ground around it.

8. The underlined word "erupts" means ______.

A. moves down   B. breaks away    C. builds up        D. suddenly throws out lava

9. Which words in the passage have the same meaning as "melted rock"?

A. volcano and crust                  B. crust and hard rock

C. magma and lava                  D. volcano and magma

10. Which is the correct order of the layers of the earth (beginning with the top layer)?

A. crust — hard rock — magma — soft rock

B. crust — hard rock — soft rock — magma

C. agma — soft rock — hard rock — crust

D. volcano — cracks — magma — crust

11. The best title of the passage should be______.

A. The Volcano         B. Kilimanjaro Volcano   C. The Mountains   D. The Melted Rock

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

The need to feed a growing population is putting much pressure on the world’s supply of water. With 97% of the world’s water too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage(短缺)seems strange to someone fortunate enough to live in a high rainfull country, many of the world’s agricultural industries experience constant water shortages.

Although dams can be built to store water for agricultural use in dry areas and dry seaons, the costs of water redistribution(重新分配)are very high. Notonly is there the cost of the engineering itself, but there is also an environmental cost to be considered. Where valleys(山谷)are flooded to create dams, houses are lost and wildlife homes destroyed. Besides, water many flow easily through pipes to fields,but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.

This is particularly troubling ro countries with agricultural industries in areas dependent on irrigation(灌溉). In Texas, farmers’ overuse of irrigation water be resulted in a 25% redcution of the water stores. In the Central Valley area of south eastern USA, a huge water engineering project provided water for farming in dry vallege, but much of the water use has been poorly managed.

Saudi Arabia’s attempts to grow wheat in desert areas have been the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas, such reserves can only decrease, and it is believed that fifty years of pumping will see them run dry.

1. From the first two paragraphs we learnt that _______.

A.much of the world’s water is available for use

B.people in high rainfll countries feel lucky

C.the costs of water redistribution should be considered

D.water can be easily carried through pipes across the world

2.Which of the following is true?

       A.The water  in Texas have been reduced by 75%.

       B.Most industries in the world suffer from water shortagers.

       C.The underground water in Saudi Arabia might run out in 50 years.

       D.Good management of water use resulted from the project in the Central Valley.

3.What is most likely to be discussed in the paragreh that follows?

       A.Steps to improving water use managet.

       B.Ways tor redjuce the costs of builing dams.

       C.Measured to dmal with worldwide water shortages.

       D.Appmihes to handling the pressure on water supply.

4.The text is mainly about____________.

       A.water supply and increasing population

       B.water use management and agriculture

       C.water redistribution and wildlife protection

       D.water shornages and environmental protection.

查看答案和解析>>

科目:高中英語 來源:2010年普通高等學校招生全國統(tǒng)一考試(安徽卷)英語 題型:閱讀理解


The need to feed a growing population is putting much pressure on the world’s supply of water. With 97% of the world’s water too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage(短缺)seems strange to someone fortunate enough to live in a high rainfull country, many of the world’s agricultural industries experience constant water shortages.
Although dams can be built to store water for agricultural use in dry areas and dry seaons, the costs of water redistribution(重新分配)are very high. Notonly is there the cost of the engineering itself, but there is also an environmental cost to be considered. Where valleys(山谷)are flooded to create dams, houses are lost and wildlife homes destroyed. Besides, water many flow easily through pipes to fields,but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.
This is particularly troubling ro countries with agricultural industries in areas dependent on irrigation(灌溉). In Texas, farmers’ overuse of irrigation water be resulted in a 25% redcution of the water stores. In the Central Valley area of south eastern USA, a huge water engineering project provided water for farming in dry vallege, but much of the water use has been poorly managed.
Saudi Arabia’s attempts to grow wheat in desert areas have been the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas, such reserves can only decrease, and it is believed that fifty years of pumping will see them run dry.
1. From the first two paragraphs we learnt that _______.
A.much of the world’s water is available for use
B.people in high rainfll countries feel lucky
C.the costs of water redistribution should be considered
D.water can be easily carried through pipes across the world
2.Which of the following is true?
A.The water  in Texas have been reduced by 75%.
B.Most industries in the world suffer from water shortagers.
C.The underground water in Saudi Arabia might run out in 50 years.
D.Good management of water use resulted from the project in the Central Valley.
3.What is most likely to be discussed in the paragreh that follows?
A.Steps to improving water use managet.
B.Ways tor redjuce the costs of builing dams.
C.Measured to dmal with worldwide water shortages.
D.Appmihes to handling the pressure on water supply.
4.The text is mainly about____________.
A.water supply and increasing population
B.water use management and agriculture
C.water redistribution and wildlife protection
D.water shornages and environmental protection.

查看答案和解析>>

科目:高中英語 來源:2015屆四川省實驗學校高一3月月考英語試卷(解析版) 題型:閱讀理解

Somali pirates(海盜) robbed three Thai fishing ships with 77 sailors on board nearly l,200 miles off the Somali coast,the farthest-off-shore attack to date,an officer said Tuesday.

Pirates have gone farther south and east in answer to increased patrols(巡邏)by warships off the Somali shore. The robbing of the three ships on Sunday was about 600 miles outside the normal operation area for the international force,said a spokesman.

The spokesman said the attack so far out at sea was a clear sign that the international patrols against pirates were having a “marked effect on pirate activity in the area”.

“Once they start attacking that far out,you’re not even really talking about the Somali basin or areas of water that have any connection with Somalia,” said an officer,Ro ger Middleton.“Once you’re that far out,it's just the Indian Ocean,and it means you’re looking at trade going from the Gulf to Asia,from Asia to South Africa.”

"This is the farthest robbing to date.They are now operating near the Maldives and India,”said another officer.

The three ships--the MV Prantalay ll,12,and l 4—had 77 members on board in total.All of them are Thai, the spokesman said.Before the Sunday robbing,pirates held l l ships and 228 sailors.

Pirates have increased attacks over the past year in hopes of catching more dollar payments. Because of increased patrols and defenses on board ships,the success rate(率)has gone down,though the number of successful attacks has stayed the same year over year.

1.Which is the best title of the passage?

A.Somali Pirates Robbing Three Thai Fishing Ships.

B.Somali Pirates

C.Somali pirates Attack.

D.Somali Pirates Enlarging Their Field Increasingly.

2.The pirate attack reported in the text happened            

A.far out in the Indian Ocean

B.in the normal patrol area

C.near the Somali, coast

D.in the south of Africa

3.According to the text, which can best describe the situation of the pirate problems?

A.More goods on board are lost.

B.Pirate attacks happen in a larger area now.

C.The number of attacks has stayed the same these years.

D.Pirate attacks are as serious as before along the Somali coast.

4.Which is true about the warship patrols according to the text?

A.The patrols are of little effect.

B.The patrols are more difficult.

C.More patrols are quite necessary even in Asia.

D.The patrols only drive the pirates to other areas.

5.How many sailors were held by the pirates up to the time of the report?

A.228.             B.77.               C.383.             D.305.

 

查看答案和解析>>

科目:高中英語 來源:2011-2012學年江蘇省高三模擬考試(十)英語試卷(解析版) 題型:閱讀理解

If California were not already so famous for Sillicon Valley(硅谷) and Hollywood, it might be well-known for the groups of water-technology firms in its San Diego County. The reverse-osmosis (RO) spiral module, the technique that supports turning seawater and waste-water into drinkable stuff, began in San Diego in 1964. Today dozens of firms in the area supply many of the world's approximately 13,000 RO plants in places from the Persian Gulf and Israel to Australia and China.

Southern California itself, however, has not so far been a big user of its own technology. This is surprising, given that the whole American south-west faces a water problem. But now as the climate gets warmer and the population increases, there is more agreement that the existing infrastructure, consisting of vast pipes that carry water from the Sacramento Delta in the north and the Colorado River in the east, will not be enough. In places such as San Diego, which has inadequate and salty groundwater and currently imports 90% or its water, the answers must be greater conservation, reusing as much water as possible, and getting most of the rest from the sea.

The first part, conservation, has been widely accepted by the public. San Diego today uses less water with a larger population than it did in 1989, the year water consumption peaked. The second part, water recycling has been a hard sell, because of an unpleasant factor. Americans still use the term “toilet-to-tap” for recycling, even though properly treated waste-water is nowadays completely clean. Singapore made its programme acceptable in part by renaming it as NEWater.

This is where desalination comes in, which means taking the salt out of salt water. A firm called Poseidon Resources is now close to building the biggest desalination plant in America behind a power station by the beach in Carlsbad. The power plant sucks in 304m gallons of seawater a day for cooling, so Poseidon plans to change 104m gallons a day by using the RO spiral module.

Lots of people like the idea. Once fully running in 2015, the plant could produce 10% of the region's water. And there are plans for more desalination plants. Many places would need to take much less water from the endangered Colorado River. But a few people hate it a lot. Joe Geever, an expert in biology, says desalination uses too much energy and that Poseidon plant would kill too much sea life. He understands that there is a role for desalination, he says, but would rather not have it right there, right now, and on this scale.

1.Which of the following is WRONG about the RO spiral module according to the passage?

A. This technology is not widely used in its birthplace.

B. Today there are about 13,000 RO plants in the Persian Gulf, Israel, Australia and China.

C. This technology can be used in desalination plants to make sea water drinkable.

D. It is a promising water treatment technology welcomed by a lot of people.

2.How many solutions to the water problem in San Diego are mentioned in the article?

A. 2.  B. 3.  C. 4.  D. 5.

3.What can we infer from the article?

A. The Colorado River is the main water source for California.

B. Americans still use the term “toilet-to-tap” for recycling water.

C. NEWater serves as a brand for recycled clean water in Singapore.

D. Poseidon Resources stands for the power station by the beach in Carlsbad.

4.What is Joe Geever's attitude toward building a large desalination plant at present?

A. Supportive.  B. Negative.  C. Optimistic.  D. Vague.

 

查看答案和解析>>

同步練習冊答案