If humans ever settle on Mars, they will need water. There is just one problem---there seems to be only huge sheets of ice. Luckily, we know how to drill(钻孔） ice for water. Such methods are already used in Antarctica, and researchers now think they could get them to work on the Red Planet, too. The atmosphere of Mars is too dry to make extracting water vapour from it possible. So ice seems the best bet. But the obvious ice sheets are in the unlivable polar ice caps and would be difficult to reach for drilling.
However, in 2018, at the edge of the cliffs, NASA's Mars Reconnaissance Orbiter spotted relatively accessible water ice that is probably at least 130metres thick and covered in just a few metres of rock and dust. These may be the best place to get the water needed for future exploration of the planet.
The drilling techniques needed have already been developed for cold areas on Earth where we need to melt buried ice for water. In the early 1960s the US Army used a type of subsurface reservoir(水库)called Rod Well, in army camps in Greenland. The method works by drilling through the ground into the ice, melting the ice to create a pool, and then pumping water up. By supplying heat continuously, they create a reservoir and a steady water supply. It has been used in remote areas such as the Amundsen-Scott South Pole Station Stephen Hoffman at the Aerospace Corporation in Texas and his colleagues simulated(模拟)how a Rod Well would do on Mars. They found that with the power of 9 kilowatts (千瓦)to melt ice, it could in theory produce about 380 litres of water each day and maintain a reservoir of constant size at the bottom of a borehole(钻孔). That is close to the average daily water use each person in the US, but about 10 times what each astronaut on the International Space Station uses daily.
1.Which of the following can replace the underlined word "extracting" in the first paragraph ?
A.obtaining B.protecting
C.Preventing D.choosing
2.Why does the author mention the Rod Well in Paragraph 3?
A.To explain how water ice is drilled on Mars.
B.To tell about the history of water ice drilling techniques.
C.To prove the importance of water ice drilling techniques
D.To show techniques for drilling water wells in Martian ice exist.
3.On average, how much water does an astronaut on the International Space Station use daily?
A.10 litres B.38 litres
C.160 litres D.380 litres
4.What would be the best title for the text?
A.Preparing to settle on the Red Planet one day.
B.Finding water on the Red Planet for survival.
C.Using some ways to create a livable environment on Mars.
D.Drilling water wells in Martian ice to survive on Mars.
高三英语阅读理解中等难度题
If humans ever settle on Mars, they will need water. There is just one problem---there seems to be only huge sheets of ice. Luckily, we know how to drill(钻孔） ice for water. Such methods are already used in Antarctica, and researchers now think they could get them to work on the Red Planet, too. The atmosphere of Mars is too dry to make extracting water vapour from it possible. So ice seems the best bet. But the obvious ice sheets are in the unlivable polar ice caps and would be difficult to reach for drilling.
However, in 2018, at the edge of the cliffs, NASA's Mars Reconnaissance Orbiter spotted relatively accessible water ice that is probably at least 130metres thick and covered in just a few metres of rock and dust. These may be the best place to get the water needed for future exploration of the planet.
The drilling techniques needed have already been developed for cold areas on Earth where we need to melt buried ice for water. In the early 1960s the US Army used a type of subsurface reservoir(水库)called Rod Well, in army camps in Greenland. The method works by drilling through the ground into the ice, melting the ice to create a pool, and then pumping water up. By supplying heat continuously, they create a reservoir and a steady water supply. It has been used in remote areas such as the Amundsen-Scott South Pole Station Stephen Hoffman at the Aerospace Corporation in Texas and his colleagues simulated(模拟)how a Rod Well would do on Mars. They found that with the power of 9 kilowatts (千瓦)to melt ice, it could in theory produce about 380 litres of water each day and maintain a reservoir of constant size at the bottom of a borehole(钻孔). That is close to the average daily water use each person in the US, but about 10 times what each astronaut on the International Space Station uses daily.
1.Which of the following can replace the underlined word "extracting" in the first paragraph ?
A.obtaining B.protecting
C.Preventing D.choosing
2.Why does the author mention the Rod Well in Paragraph 3?
A.To explain how water ice is drilled on Mars.
B.To tell about the history of water ice drilling techniques.
C.To prove the importance of water ice drilling techniques
D.To show techniques for drilling water wells in Martian ice exist.
3.On average, how much water does an astronaut on the International Space Station use daily?
A.10 litres B.38 litres
C.160 litres D.380 litres
4.What would be the best title for the text?
A.Preparing to settle on the Red Planet one day.
B.Finding water on the Red Planet for survival.
C.Using some ways to create a livable environment on Mars.
D.Drilling water wells in Martian ice to survive on Mars.
高三英语阅读理解中等难度题查看答案及解析
Sometime early in the next century, human beings will move to Mars. They will live there for about a year, and then will be replaced with another group of pioneers. Building the base on Mars will advance our knowledge of the solar system and aid in our understanding of the earth.
We already know that Mars resembles the earth in many aspects: general size, presence of water, length of day, range of temperatures. These resemblances have caused many people to consider a centuries-long project: to terraform Mars. Terraforming means altering a planet’s surface so that Earth’s life forms can survive there. This concept, previously found only in science fiction is now being seriously considered by scientists.
Terraforming Mars is theoretically simple: add nitrogen and oxygen to the atmosphere; pump water to the surface; and add the earth’s plants and animals in the order in which they developed on Earth. But it will take at least 300 years.
Some people think that such a project is too huge for humans to undertake, but there are very good reasons to make the attempt. The earth now contains some 6 billion people, and no one has any idea of how many humans the earth can support. Our very existence and numbers are threatening many other species. We also have had some experience with terraforming our own planet: altering the landscape, the atmosphere and the climate. Currently terraforming earth has become a wiser activity as we try to control global warming, air and water pollution, and preserve some natural living places.
While the possibility of such a project is small, it is not impossible .Even if earth –bound societies come and go in the next 300 years, the project can continue through the work of the Mars settlers without the need for constant backing from the earth.
The future existence of all the people in our world may very well depend upon our ability to terraform Mars.
1.What would be the best title for this passage?
A．Terraforming Mars. B．Saving the Earth
C．Travelling to Mars. D．A Newly-found Place
2.What does the underlined word “altering” mean in the second paragraph?
A．Warming. B．Changing. C．Planting. D．Building
3.According to the passage the main purpose of terraforming Mars is to ________.
A．do some scientific research work
B．find out its similarity to earth
C．avoid the dying away of many other species
D．find on Mars living place for the increasing human beings
4.The main reason for causing many people to consider terraforming Mars is that _______.
A．there are some resemblances between Earth and Mars.
B．terraforming Mars is theoretically simple
C．we have had some experience with terraforming our own planet: Earth
D．the development of science and technology is very rapid
5.What’s the author’s attitude towards the project?
A．Optimistic. B．Negative
C．Sceptical（怀疑的） D．Objective.
高三英语阅读理解中等难度题查看答案及解析
Sometime early in the next century, human beings will move to Mars．They will live there for about a year, and then will be replaced with another group of pioneers．Building the base on Mars will advance our knowledge of the solar system and aid in our understanding of the earth．
We already know that Mars resembles the earth in many aspects: general size, presence of water, length of day, range of temperatures．These resemblances have caused many people to consider a centuries-long project: to terraform Mars．Terraforming means altering a planet’s surface so that Earth’s life forms can survive there．This concept, previously found only in science fiction is now being seriously considered by scientists．
Terraforming Mars is theoretically simple: add nitrogen and oxygen to the atmosphere; pump water to the surface; and add the earth’s plants and animals in the order in which they developed on Earth．But it will take at least 300 years．
Some people think that such a project is too huge for humans to undertake, but there are very good reasons to make the attempt．The earth now contains some 6 billion people, and no one has any idea of how many humans the earth can support．Our very existence and numbers are threatening many other species．We also have had some experience with terraforming our own planet: altering the landscape, the atmosphere and the climate．Currently terraforming Earth has become a wiser activity as we try to control global warming, air and water pollution, and preserve some natural living places．
Small as the possibility of such a project is, it is not impossible．Even if earth-bound societies come and go in the next 300 years, the project can continue through the work of the Mars settlers without the need for constant backing from the earth．
The future existence of all the people in our world may very well depend upon our ability to terraform Mars．
1.What would be the best title for this passage?
A．Terraforming Mars． B．Saving the Earth．
C．Travelling to Mars． D．A Newly-found Place．
2.What does the underlined word “altering” mean in the second paragraph?
A．Warming． B．Changing． C．Planting． D．Building．
3.According to the passage the main purpose of terraforming Mars is to _____．
A．do some scientific research work
B．find out its similarity to Earth
C．avoid the dying away of many other species
D．find on Mars living place for the increasing human beings
4.The main reason for causing many people to consider terraforming Mars is that _____．
A．there are some resemblances between Earth and Mars
B．terraforming Mars is theoretically simple
C．we have had some experience with terraforming our own planet: Earth
D．the development of science and technology is very rapid
高三英语阅读理解中等难度题查看答案及解析
Sometime early in the next century, human beings will move to Mars．They will live there for about a year, and then will be replaced with another group of pioneers．Building the base on Mars will advance our knowledge of the solar system and aid in our understanding of the earth．
We already know that Mars resembles the earth in many aspects: general size, presence of water, length of day, range of temperatures．These resemblances have caused many people to consider a centuries-long project: to terraform Mars．Terraforming means altering a planet’s surface so that Earth’s life forms can survive there．This concept, previously found only in science fiction is now being seriously considered by scientists．
Terraforming Mars is theoretically simple: add nitrogen and oxygen to the atmosphere; pump water to the surface; and add the earth’s plants and animals in the order in which they developed on Earth．But it will take at least 300 years．
Some people think that such a project is too huge for humans to undertake, but there are very good reasons to make the attempt．The earth now contains some 6 billion people, and no one has any idea of how many humans the earth can support．Our very existence and numbers are threatening many other species．We also have had some experience with terraforming our own planet: altering the landscape, the atmosphere and the climate．Currently terraforming Earth has become a wiser activity as we try to control global warming, air and water pollution, and preserve some natural living places．
Small as the possibility of such a project is, it is not impossible．Even if earth-bound societies come and go in the next 300 years, the project can continue through the work of the Mars settlers without the need for constant backing from the earth．
The future existence of all the people in our world may very well depend upon our ability to terraform Mars．
1.What would be the best title for this passage?
A．Terraforming Mars． B．Saving the Earth．
C．Travelling to Mars． D．A Newly-found Place．
2.What does the underlined word “altering” mean in the second paragraph?
A．Warming． B．Changing． C．Planting． D．Building．
3.According to the passage the main purpose of terraforming Mars is to _____．
A．do some scientific research work
B．find out its similarity to Earth
C．avoid the dying away of many other species
D．find on Mars living place for the increasing human beings
4.The main reason for causing many people to consider terraforming Mars is that _____．
A．there are some resemblances between Earth and Mars
B．terraforming Mars is theoretically simple
C．we have had some experience with terraforming our own planet: Earth
D．the development of science and technology is very rapid
高三英语阅读理解中等难度题查看答案及解析
Most human beings are kind,good-natured beings who will hep someone out in need if they are able to,especially if that someone is a little kid.Travis Sattler is one of those human beings.
The 18-year-old didn't think twice about helping a little boy who walked up to the counter at Freddy's Frozen Custard where he'd been working for a year.The little boy named Johnny Smith had just finished eating with his mother when he walked up to the counter where Travis was working as the cashier(收银员）。He ordered an ice cream."Once I told him the total, he was counting his change and all of his money, and then he handed everything to me.But he didn't have enough money to pay for it. He was maybe $2 short,"Travis said.
But Travis wasn't about to let this boy walk out of the restaurant without his ice cream.So,he pulled out his credit card and told the boy to take the ice cream away."He had a big smile and the widest eyes when he ran back to his mom and told her what happened,"Travis said.
About 30 minutes later,the little boy walked up to Travis and handed him a note before walking out of the restaurant with his mom.It says,"Thank you for being so nice and paying for my ice cream.We need more people like you."The note also had a $100 bill folded in it.
＂I think I brightened up their day,"Travis said.And Travis's boss couldn't be more proud of him. He gave him an extra $100 bill as well and sent him some goodies.
1.How did Johnny feel when Travis paid for the ice cream?
A.Worried. B.Delighted.
C.Nervous. D.Confused.
2.Which of the following can best describe Travis?
A.Curious. B.Humorous.
C.Hard-working. D.Kind-hearted.
3.What can we learn from the text?
A.Johnny's mother couldn't afford the ice cream.
B.Travis has helped many people in the restaurant.
C.Travis Sattler's boss praised him for his behaviour.
D.Johnny's mother wrote to Travis and sent him a $2 bill.
4.What does the author want to show through Travis's story?
A.What goes around comes around.
B.Kindness does need to be rewarded.
C.A small act of kindness makes a big difference.
D.Happiness is more than the mere possession of money.
高三英语阅读理解中等难度题查看答案及解析
As is reported, it will be more than 20 years ________ humans are able to walk on Mars.
A．before B．when C．since D．after
高三英语单项填空中等难度题查看答案及解析
It is not until recently ______ the scientists have found proof of there being water on Mars.
| A．when | B．that | C．how | D．what |
高三英语单项填空简单题查看答案及解析
---Fish need water to survive; _____ , we human beings rely on air to live.
| A．particularly | B．obviously | C．actually | D．similarly |
高三英语单项填空中等难度题查看答案及解析
All plants need air_____ they need water.
| A．like | B．as if | C．as | D．so |
高三英语单项填空简单题查看答案及解析
A recent research shows that there _____ volcanic activities on the moon and Mars. However, they no longer exist now.
A. had been B. has been C. were D. would be
高三英语单项填空困难题查看答案及解析