【题目】阅读理解

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 observations.

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 that the oceanis 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 the 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 exoplanets as well.

1What can we learn about 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.

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

A. Cautious. B. Doubtful.

C. Negative. D. Favourable.

3What 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.

4What type of writing does this passage belong to?

A. A term essay.

B. A news report.

C. An experiment report.

D. An exploration review.

【题目】阅读理解
“The car of tomorrow” runs one of the most famous businesses in advertising. People used to believe that science would promise a future of endless spare time and very cheap electricity. Nowadays the scientists' predictions are a great deal less optimistic: a world challenged by climate change and decreasing resources.

In fact, “the car of the future” is just a symbol of hope. Carbon emis-Investment in new technology to maximize efficiency (效率) and minimize environmental damage is not only cleaning up the automobile producers' act but is also setting an example to other industries.
It's said that most cars of today run at about 15 per cent efficiency, which does highlight the potential (突显潜力) for improvement. Get it right, and we could continue to enjoy the freedom that comes with owning a car, without the worries.
Of course, many advances have already been made. There's evidence that the buying public is eager to switch to cleaner, greener cars. And with petrol prices increasing there is no doubt that economical, efficient engines are going to be in ever greater demand.
The good news is that we can all drive “the car of tomorrow” today, without having to worry about the purchase cost. By choosing our holiday hire cars wisely we can cut down on our fuel costs and experience an eco-friendly drive whether or not we have already made the commitment back home. What's more, we are caring for the beautiful places we love to holiday in. Hire a green car and you make a difference to the environment.
Designers will always enjoy catching our imagination with “concept cars” that look more like miniature spaceships than anything you see on the highway. Whether vehicles as radical (激进的) as these creations will eventually become family cars remains to be seen. But, for the moment, there's no doubt at all what “the car of tomorrow” will be, and it's here today: something familiar and friendly that does its job with considerably less trouble and much greater efficiency than the car of yesterday.
(1)From the text the author wants to .
A.make a comparison
B.introduce a new kind of car
C.make an advertisement
D.change an old concept
(2)One current worry about developing the car industry is that .
A.it provides less money
B.it's not environmentally friendly
C.the competition is very fierce
D.the economic situation affects it a lot
(3)It can be inferred from the fourth paragraph that .
A.fewer cars will be produced in the future
B.cleaner and greener cars are more expensive
C.cleaner and greener cars are in great need
D.no measures have been taken to improve car efficiency
(4)What can we learn about “concept cars”?
A.It is doubtful that they will become family cars.
B.They're considered as a result of imagination.
C.They're of high efficiency and make less pollution.
D.They look like traditional cars on the highway.

 0  147995  148003  148009  148013  148019  148021  148025  148031  148033  148039  148045  148049  148051  148055  148061  148063  148069  148073  148075  148079  148081  148085  148087  148089  148090  148091  148093  148094  148095  148097  148099  148103  148105  148109  148111  148115  148121  148123  148129  148133  148135  148139  148145  148151  148153  148159  148163  148165  148171  148175  148181  148189  151629 

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网