When astronauts return to the earth's atmosph...

When astronauts return to the earth's atmosphere, helicopters fly to ________ they would land, ready to collect them.

A. what           B. where                C. which            D. that

高三英语单项填空中等难度题查看答案及解析

When astronauts return to the earth's atmosphere, helicopters fly to________they would land, ready to collect them.

高三英语单项填空简单题查看答案及解析

Without the earth’s atmosphere to protect them, astronauts can be exposed to intense radiation from the sun, ____ them at risk of cancer.

A. to leave         B. leaving       C. having left    D. left

高三英语单项填空中等难度题查看答案及解析

NASA has big plans for returning astronauts to the moon in 2024, a stepping stone on the path to sending humans to Mars. But where should the first people on the Red Planet land? While there are lots of places on Mars scientists would like to visit, few would make practical landing sites for astronauts. Thanks to the researchers, their newly-published paper in Geophysical Research Letters will help by providing a map of water ice believed to be as little as an inch (2. 5 centimeters) below the surface.

Water ice will be a key consideration for any potential landing site. With little room to spare aboard a spacecraft, any human missions to Mars will have to harvest what’s already available for drinking water. Liquid water can’t last in the thin air of Mars. With so little air pressure, it turns from a solid to a gas when exposed to the atmosphere. On this planet, water ice is locked away underground. Buried water ice changes the temperature of the Martian surface, so the study’s authors relied on heat-sensitive instruments to find ice that astronauts could easily dig up. The authors of the new paper make use of data from spacecrafts to locate water ice that could potentially be within reach of astronauts on the Red Planet.

The paper’s lead author, Sylvain Piqueux of NASA’s Jet Propulsion Laboratory in Pasadena, California said, ‘‘We’re continuing to collect data on buried ice on Mars, aiming to find the best places for astronauts to land.” Piqueux is planning a comprehensive campaign to continue studying buried ice across different seasons, watching how the abundance of this resource changes over time.

1.What’s the benefit of the study?

A.To produce a map of the surface of Mars.

B.To help decide where to land on Mars.

C.To speed up the harvest of ice deep inside Mats.

D.To arouse attention to seasonal changes on Mars.

2.Why is water ice important for any landing site?

A.Because it is the source of power.

B.Because water only exists in the form of solid on Mars.

C.Because it can serve as drinking water.

D.Because astronauts are too busy to collect pure water.

3.How can heat-sensitive instruments tell the location of buried ice?

A.By measuring the surface temperature of Mars.

B.By digging up the surface of Mars.

C.By collecting the data of rocket fuel.

D.By calculating the amount of liquid in the air.

4.In which section of a website may this text appear?

A.Education. B.Travel.

C.Sport. D.Technology.

高三英语阅读理解困难题查看答案及解析

After Yang Liwei succeeded in circling the earth, __________our astronauts desire to do is walk in space.

A.  where        B. what               C. that      D. which

高三英语单项填空中等难度题查看答案及解析

The news that Shenzhou VII returned to the earth successfully _____ throughout the country．

A．stretched           B．expanded      C．extended       D．spread

高三英语单项填空中等难度题查看答案及解析

A few hours after my first mission, returning to Earth on the space shuttle Endeavour, I completed all of my medical tests after flight, met with NASA officials, and reunited with my family. Finally, I was alone in my office room in astronaut crew quarters at the Kennedy Space Center, exhausted and ready for bed. And I did what anyone does when they return to their hotel room on a business trip: I turned on the TV. The television news started up: Such and such had happened, people were shocked, blah blah blah. Sports scores. Silly commercials.

It didn’t take more than a minute before I had to turn it off. It felt like my body was rejecting all this input, just as it would reject an organ donation that had the wrong blood type. All of this noise was just completely foreign to who I was—or, more appropriately, who I had become. A few hours before, I had been orbiting Earth, seeing our planet from space, flying the most amazing machine ever built by human hands, working with a team that was the absolute success of human. And now here in my room watching what was being sold as news, and with my newfound perspective, I just could not stomach it. My worldview was changed forever in a profound (深刻的) way.

The biggest change by far and the one for which I will always be most grateful is this big-picture perspective. That will stick with me for the rest of my life.

Whenever I feel the pressure of modern life, the stress about work, or worry about the future, I remember my time in the space station. Back to seeing the sun set Or watching our galaxy rise on the horizon. Or seeing a sea of lightning flash a hundred times a second. Or simply back to floating weightlessly.

When I’m there in my mind and realize how many billions of these beautiful sunsets there have been and will be in the future, the cares of the world just don’t seem that pressing. It goes that, “Do not worry about tomorrow, for tomorrow will worry about itself.” Living daily life down here on the planet is so much better with this attitude!

1.Which of the following is closest in meaning to the underlined word stomach in paragraph 2?

A.Access. B.Attend.

C.Accept. D.Afford.

2.What is the most important change to the writer?

A.He has a broader view of the world.

B.He doesn’t like watching TV any more.

C.He will always be most grateful for everything.

D.He can fly the most amazing machine by hands.

3.What attitude to life does the writer tend to have?

A.caged bird longs for clouds. B.Live in the present moment.

C.Let bygones be bygones. D.Time works great changes.

高三英语阅读理解困难题查看答案及解析

As Hubble is above the Earth’s atmosphere, which disturbs starlight, Hubble’s images are much sharper than ________ of other Earth-based telescope.

高三英语单项填空简单题查看答案及解析

An increased concentration of carbon dioxide and certain other gases in the Earth’s atmosphere ______ global warming.

A. contributing to　　　　 B. contribute to

C. contributes to　　 　　 D. to contribute to

高三英语单项填空简单题查看答案及解析

Many gases ________ in the atmosphere actually ________ heat energy that escapes from the Earth’s surface back to the earth.

A. finding; reflecting                      B. found; reflected

C. found; to reflect                        D. found; reflect

高三英语单项填空中等难度题查看答案及解析