Washington: NASA has announced evidence that ...

Washington: NASA has announced evidence that Jupiter's largest moon, Ganymede, has a saltwater ocean under its icy surface. The ocean seems to have more water than all the water on Earth's surface, according to new Hubble observation.

New Hubble observations of Ganymede's magnetic field strongly suggest that the moon, which is the largest in our whole solar system, is home to a subsurface ocean.

Scientists estimate the ocean is 95 kilometres thick, which is about 10 times deeper than Earth's oceans. But unlike our salty waters, Ganymede's ocean is buried under 150 kilometres of ice.

While scientists have speculated(推测) since 1970s about the presence of an ocean on Ganymede------the largest moon in our solar system------ until now the only observational evidence came from a brief flyby by the Galileo spacecraft, which didn’t observe the moon long enough to confirm a liquid ocean.

This discovery marks an important milestone, highlighting what only Hubble can accomplish. In its 25 years in orbit, Hubble has made many scientific discoveries in our own solar system. A deep ocean under the icy surface of Ganymede opens up further exciting possibilities for life beyond Earth.

Scientists have already confirmed the existence of an ocean on Europa, another moon orbiting Jupiter, and NASA has announced plans to send an unmanned mission there searching for the life that might come with liquid water.

Hubble is a telescope that orbits Earth, but because of its impressive gravitational analyses it can be used to study the inside of far distant planets. Using these same principles, scientists could theoretically detect oceans on distant planets as well.

1.What can we learn about the Ganymede from the passage?

A. It is a planet with the largest moon in our whole solar system.

B. Its ocean adds to people’s excitement about life beyond Earth.

C. It will be used by NASA as a base for the Hubble telescope.

D. Its liquid ocean was first proved by the Galileo spacecraft.

2.Which of the following best describes the writer’s attitude towards Hubble?

A. Cautious　　　 B. Doubtful

C. Negative　　　 D. Favourable

3.What does the underlined part in Paragraph 6 mean?

A. An underground ocean has been found in Europa.

B. The presence of an underground ocean in Europa is not possible.

C. It is now certain that there is an ocean on Europa.

D. No evidence has shown the existence of an ocean on Europa.

4.What type of writing does this passage belong to?

A. A term essay　 　　　　 B. A news report

C. An experiment report　 D. An exploration review.

高二英语阅读理解中等难度题查看答案及解析

NASA has opened the door to the next generation of space discovery by announcing great plans for a base for humans to live on the surface of the moon forever.

The project to build a base on the moon will begin soon after 2020, with astronauts living there within four years.

The project comes after several excellent scientists and environmentalists asked humans to look beyond Earth to ensure the survival of the species (物种).

Eventually, the moon will be a base for humans to explore the solar system and one day land on Mars.

NASA began planning for the first moon landing since 1972 when George Bush, the US president, announced his new plan for space exploration four years ago.

NASA has already talked about the design of the Orion spacecraft that will replace the old space shuttle fleet in 2010.

The plan for the moon base, however, is the first detailed explanation of how NASA intends to prepare for the first manned exploration of deep space and a possible Mars mission within 30 years.

Scientists also believe that the south pole on the moon contain rich natural gases such as the rare helium-3 that could be used as fuel for the generation of nuclear power. Besides, teams of astronauts living there for six months at a time would mine for hydrogen and oxygen to make water and possibly rocket fuel.

1.When was the plan to explore space first announced according to the passage?

A．In 1972.          B．In 1950.           C．In 1968.           D．In 2020.

2.The reasons why NASA has begun the plan to explore space include the followings except ________.

A．to protect Earth                        B．to explore deep space

C．to finish Mars mission                    D．to show how powerful the USA is

3.In the future, when people fly to the moon, they will probably not bring with them too much ________

A．hydrogen         B．food             C．oxygen           D．water

4.The passage mainly talks about ________.

A．the USA’s new plan for space exploration

B．how to build a base on the moon

C．why to ensure the survival of the species

D．where to get new natural resources

高二英语阅读理解困难题查看答案及解析

NASA has opened the door to the next generation of space discovery by announcing great plans for a base for humans to live on the surface of the moon forever.

The project to build a base on the moon will begin soon after 2020, with astronauts living there within four years.

The project comes after several excellent scientists and environmentalists asked humans to look beyond Earth to ensure the survival of the species (物种).

Eventually, the moon will be a base for humans to explore the solar system and one day land on Mars.

NASA began planning for the first moon landing since 1972 when George Bush, the US president, announced his new plan for space exploration four years ago.

NASA has already talked about the design of the Orion spacecraft that will replace the old space shuttle fleet in 2010.

The plan for the moon base, however, is the first detailed explanation of how NASA intends to prepare for the first manned exploration of deep space and a possible Mars mission within 30 years.

Scientists also believe that the south pole on the moon contain rich natural gases such as the rare helium-3 that could be used as fuel for the generation of nuclear power. Besides, teams of astronauts living there for six months at a time would mine for hydrogen and oxygen to make water and possibly rocket fuel.

1.The reasons why NASA has begun the plan to explore space include the followings except ________.

A. to protect Earth

B. to explore deep space

C. to finish Mars mission

D. to show how powerful the USA is

2.In the future, when people fly to the moon, they will probably not bring with them too much ________

A. hydrogen　　 B. food　　 C. oxygen　　 D. water

3.The passage mainly talks about ________.

A. the USA’s new plan for space exploration

B. how to build a base on the moon

C. why to ensure the survival of the species

D. where to get new natural resources

高二英语阅读理解中等难度题查看答案及解析

NASA has opened the door to the next generation of space discovery by announcing great plans for a base for humans to live on the surface of the moon forever.

The project to build a base on the moon will begin soon after 2020, with astronauts living there within four years.

The project comes after several excellent scientists and environmentalists asked humans to look beyond Earth to ensure the survival of the species (物种).

Eventually, the moon will be a base for humans to explore the solar system and one day land on Mars.

NASA began planning for the first moon landing since 1972 when George Bush, the US president, announced his new plan for space exploration four years ago.

NASA has already talked about the design of the Orion spacecraft that will replace the old space shuttle fleet in 2010.

The plan for the moon base, however, is the first detailed explanation of how NASA intends to prepare for the first manned exploration of deep space and a possible Mars mission within 30 years.

Scientists also believe that the south pole on the moon contain rich natural gases such as the rare helium-3 that could be used as fuel for the generation of nuclear power. Besides, teams of astronauts living there for six months at a time would mine for hydrogen and oxygen to make water and possibly rocket fuel.

1.The reasons why NASA has begun the plan to explore space include the followings except ________.

A. to protect Earth

B. to explore deep space

C. to finish Mars mission

D. to show how powerful the USA is

2.In the future, when people fly to the moon, they will probably not bring with them too much ________

A. hydrogen　　　　 B. food　　　　 C. oxygen　　 D. water

3.The passage mainly talks about ________.

A. the USA’s new plan for space exploration

B. how to build a base on the moon

C. why to ensure the survival of the species

D. where to get new natural resources

高二英语阅读理解中等难度题查看答案及解析

Evidence has been found through years of study that children’s early sleeping problems are _______ to continue when they grow up.

A．likely             B．possible           C．probable          D．narrowly

高二英语单项填空简单题查看答案及解析

It is reported in Washington Post that an unknown terrorist group has ______ responsibility for this morning’s bomb attack.

A. claimed         B. evaluated         C. bid        D. confirmed

高二英语单项填空中等难度题查看答案及解析

It has been evident that too many children in the city are left ________ when their development requires parents’ close attention.

高二英语单项填空中等难度题查看答案及解析

It has been announced by our provincial government that another two medical teams will be sent to _______ the injured people in the severe earthquake.

A. join to          B. join in

C. take part in      D. attend

高二英语单项填空简单题查看答案及解析

D

The year is 2094. It has been announced that a comet (彗星) is heading towards the Earth . Most of it will miss our planet , but two pieces will probably hit the southern half of the Earth .

On 17 July , a piece four kilometers wide enters the Earth’s atmosphere (大气层) with a massive explosion . About half of the piece is destroyed , but the remaining part hits the South Atlantic at 200 times the speed of sound . The sea boils and a huge hole is made in the sea bed . Huge waves are created and spread outwards from the hole . The wall of water , a kilometer high , rushes towards southern Africa at 800 kilometers an hour . Cities on the African coast are totally destroyed and millions of people re drowned .

Before the waves reach South America , the second piece of the comet lands in Argentina . Earthquakes and volcanoes are set off in the Andes Mountains . The shock waves move north into California and all around the Pacific Ocean . The cities of Los Angeles , San Francisco and Tokyo are completely destroyed by earthquakes . Millions of people in the southern half of the earth are already dead, but the north won’t escape for long . Because of the explosions , the sun is hidden by clouds of dust , temperatures around the world fall to almost zero .Crops are ruined . The sun won’t be seen again for many years . Wars break out as countries fight for food . A year later , no more than 10 million people remain alive .

Could it really happen ? In fact , it has already happened more than once in the history of the Earth . The dinosaurs were on the Earth for over 160 million years . Then 65 million years ago they suddenly disappeared . Many scientists believe that the Earth was hit by a piece of object in space . The dinosaurs couldn’t live through the cold climate that followed and they died out . Will we meet the same end ?

1.What is mainly described in the passage ?

2.When the first piece hits the South Atlantic , it causes           .

3.Why can’t the northern half of the earth escape for long ?

高二英语阅读理解中等难度题查看答案及解析

The year is 2094．It has been announced that a comet (彗星) is heading towards the Earth．Most of it will miss our planet , but two pieces will probably hit the southern half of the Earth．

On 17 July , a piece four kilometers wide enters the Earth’s atmosphere (大气层) with a massive explosion．About half of the piece is destroyed , but the remaining part hits the South Atlantic at 200 times the speed of sound．The sea boils and a huge hole is made in the sea bed．Huge waves are created and spread outwards from the hole．The wall of water , a kilometer high , rushes towards southern Africa at 800 kilometers an hour．Cities on the African coast are totally destroyed and millions of people re drowned．

Before the waves reach South America , the second piece of the comet lands in Argentina．Earthquakes and volcanoes are set off in the Andes Mountains．The shock waves move north into California and all around the Pacific Ocean．The cities of Los Angeles , San Francisco and Tokyo are completely destroyed by earthquakes．Millions of people in the southern half of the earth are already dead, but the north won’t escape for long．Because of the explosions , the sun is hidden by clouds of dust , temperatures around the world fall to almost zero．Crops are ruined．The sun won’t be seen again for many years．Wars break out as countries fight for food．A year later , no more than 10 million people remain alive．

Could it really happen ? In fact , it has already happened more than once in the history of the Earth．The dinosaurs were on the Earth for over 160 million years．Then 65 million years ago they suddenly disappeared．Many scientists believe that the Earth was hit by a piece of object in space．The dinosaurs couldn’t live through the cold climate that followed and they died out．Will we meet the same and ?

1.What is mainly described in the passage ?

A．A historic discovery．        B．An event of imagination

C．A research on space．      D．A scientific adventure．

2.When the first piece hits the South Atlantic , it causes ________．

A．an earthquake                             B．damages to cities

C．an Earth explosion   D．huge waves

3.Why can’t the northern half of the earth escape for long ?

A．Because the land is covered with water

B．Because the light and heat from the sun can not reach the earth．

C．Because people there can not live at the temperature of zero．

D．Because wars break out among countries．

4.By giving the example of dinosaurs , the author tries to prove ________．

A．animals could not live in the cold climate

B．what happened 65 million years ago was an invented story

C．the human beings will die out in 2094

D．the Earth could be hit by other objects in space

高二英语阅读理解简单题查看答案及解析