Can you imagine the astronauts’___________ in space?
A.to walk | B.to be walking | C.walking | D.to have walked |
高三英语单项填空简单题
Can you imagine the astronauts’___________ in space?
A.to walk | B.to be walking | C.walking | D.to have walked |
高三英语单项填空简单题查看答案及解析
You can’t imagine what difficulty we had ________home in the snowstorm.
A.walked B.walk
C.to walk D.walking
高三英语单项填空中等难度题查看答案及解析
Entering Space, astronauts can give us a fascinating account of a shuttle flight, describing the pressure of a countdown and launch, the complexities of living the days in the strange weightless environment, the challenges of working in space, the emotional effect of seeing earth from space, the drama of the meteoric landing.
However, there are also plenty of things that astronauts can’t do because of their weightless environment, and that’s very sad. What’s more, they can’t even let their sadness show, because it’s impossible to cry in zero gravity.
Of course, astronauts can still produce tears. But crying is much more difficult in space, reported The Atlantic in January. Without gravity, tears don’t flow downward out of the eyes like they do here on Earth. This means that when you cry in space, your tears have nowhere to go – they just stick to your eyes.
In May 2011, astronaut Andrew Feustel experienced this during one of his spacewalks. “Tears,” he said, “don’t fall off of your eye... They just kind of stay there.”
Besides making your vision unclear, this can also cause physical pain. Back on Earth, tears are supposed to bring comfort to the eyes. But that’s not the case in space. The space environment dries out astronauts’ eyes, and when tears suddenly wet the eyes, it can cause pain rather than comfort. “My right eye is painful like crazy.” Feustel told his teammate during the walk.
Since gravity doesn’t work in space, astronauts need some extra help to get rid of the tears. Feustel chose to rub his eyes against his helmet to wipe the tears away. Another choice is to just wait – “When the tears get big enough they simply break free of the eye and float around,” astronaut Ron Parise told The Atlantic.
There are lots of small things – things like crying – that we are so used to on Earth. We usually take them for granted, until they become a problem in a totally different environment, like space. There, astronauts can’t talk to each other directly. They also can’t eat or drink in normal ways. They can’t even burp (打嗝), because there is no gravity to hold the food down in their stomach. If they do burp, they just end up throwing up (呕吐) everything in their stomach, according to the UK National Space Center.
Thus, perhaps it’s only space explorers who can honestly say: “Gravity, you’re the best.”
1.What can we conclude from the 2nd and 3rd paragraphs?
A. Astronauts are unable to feel sad in space.
B. Tears produced in space don’t flow downward.
C. Astronauts produce fewer tears in space.
D. Tears produced in space flow down more slowly.
2.What can the astronaut do to get rid of the tears?
A. Get the tears big enough to break away from his eyes.
B. Get the tears big enough to fall off of his eyes.
C. Rub his eyes against his helmet to let the tears float forward.
D. Rub his eyes by hand to let the tears float around.
3.What’s the second-to-last paragraph mainly about?
A. Suggestions on how astronauts can stay comfortable in space.
B. Why burping is impossible in space.
C. Things that humans can’t do without gravity.
D. Other basic things that are difficult to do in space.
4.What can be the best title of this passage?
A. In the sky, you can’t cry
B. In the sky, you can’t burp
C. No Gravity, no tears
D. Better life with gravity
高三英语阅读理解中等难度题查看答案及解析
We can video chat with astronauts aboard the International Space Station and watch live footage from the frozen heights of Everest. But communicating with a submarine (潜艇)or a diver is not so easy. The lack of practical methods for sharing data between underwater and airborne devices has long been a frustration for scientists. The difficulty stems from the fact that radio signals work perfectly in air travel but poorly in water. Sonar (声呐)signals used by underwater sensors reflect off the surface of the water rather than reaching the air.
Now,researchers at MIT have developed a method with the potential to revolutionize underwater communication. “What we’ve shown is that it’s actually feasible to communicate from underwater to the air," says Fadel Adib,a professor at MJT’ s Media Lab,who led the research.
The MIT researchers designed a system that uses an underwater machine to send sonar signals to the surface, making vibrations (震动)corresponding to the ls and Os of the data. A surface receiver then reads and decodes these tiny vibrations. The researchers call the system TARF. It has any number of potential real-world uses, Adib says. It could be used to find downed planes underwater by reading signals from sonar devices in a plane' s black box and it could allow submarines to communicate with the surface.
Right now the technology is low-resolution. The initial study was conducted in the MIT swimming pool at maximum depths of around 11 or 12 feet. The next steps for the researchers are to see if TARF is workable at much greater depths and under varying conditions—high waves, storms, schools of fish. They also want to see if they can make the technology work in the other direction— air to water.
If the technology proves successful in real-world conditions, expect “texting while diving” to be the latest underwater fashion.
1.What does the author mainly talk about in Paragraph 1?
A. The future of video chat underwater and in air.
B. The frustrations of developing underwater devices.
C. The difficulty of communication from water to air.
D. The current situation of communicating with a submarine.
2.What does the underlined word “feasible” mean?
A. Achievable. B. Convenient.
C. Changeable. D. Alternative.
3.What do we know about TARF?
A. It is widely used to find downed planes.
B. It can work well at great depths underwater.
C. It is an underwater machine that sends signals.
D. It can send,receive and read signals from underwater.
4.What is the best title for the text?
A. The Real-world Uses of Sonar Technology
B. Full Water-to-air Communication Closer to Reality
C. A Breakthrough in the Application of Video Chat
D. TARF Becoming a New Means of Communication
高三英语阅读理解困难题查看答案及解析
Before astronauts can go into space, they have to have the right suit. That’s why NASA(美国国家航天和航空局)scientists are developing a new kind of space suit——lighter and more flexible than before. These new space suits will have lots of mobility(灵活性) for the astronauts, but will not need much maintenance. NASA wants the suits to include new technology that can help astronauts be safe in outer space.
Right now, the American space suit weighs about 275 pounds and is big and massive. But the suit is also easy to work in for long periods of time. The Russian space suit is less complicated, but is used only a few times and then gets thrown away.
“Finding the right balance is always going to be a challenge,” said a long-time astronaut Jeff Williams. Williams has worn both types of suits. Space suits protect astronauts from both extreme heat and freezing temperatures. They carry life-packs with oxygen for the astronauts. They also shield astronauts from radiation, or particles that send out harmful rays.
Scientists are using computers to design the new suits. This allows them to change the design again and again, and to even test the design out before actually making anything. “There’s a lot more capable tools and technology to get the job done——a lot more knowledge, as well,” said Joe Kosmo. Kosmo helped design, develop, and test suits during the Mercury, Gemini, Apollo, Skylab, and shuttle periods.
These new space suits will be much lighter and use a new kind of complex material. They also will have a smaller life support backpack, thanks to tiny electronics. NASA hopes to have the first prototypes(原型) in development by 2010 and certify(证明) the suit by 2012. This will be in time for the launch of the Orion spaceship in 2014.
1. What characteristic does the new space suit have?
A. The new space suit will need much maintenance.
B. The new space suit will be heavier than before.
C. The new space suit will have less mobility than before.
D. The new suit will use new technology to help astronauts be safe in outer space.
2.What’s the disadvantage of the Russian space suit?
A. The Russian space suit is big and massive.
B. The Russian space suit is much complicated.
C. The Russian space suit is merely used a few times.
D. The Russian space suit is easy to work in for long periods of time.
3.The underlined word “shield” in the third paragraph might mean_______.
A. harm B. protect C. help D. warn
4.Why can scientists test the design out before actually making the new space suits?
A. Because designing the new space suit is not a complex task.
B. Because computers are being used to help scientists design the new space suits.
C. Because it needs little knowledge to design the new space suits.
D. Because the scientists only change the old space suits a little and make them into the new ones.
5.How long will it take scientists to put the new space suits from prototypes into the first practical use?
A. Two years. B. Three years. C. Four years. D. Six years.
高三英语阅读理解中等难度题查看答案及解析
Thank god,you finally returned home ________.You can never imagine how I worried about you when I was told about the terrible accident.
A.safely B.safe
C.separately D.cleverly
高三英语单项填空困难题查看答案及解析
________ an astronaut into space in 2003, China became the third country to send a woman into space in June, 2012.
A.Having first put B.To have first put
C.First putting D.Being first put
高三英语单项填空困难题查看答案及解析
语法填空
Astronauts on the International Space Station (ISS) have fixed a hole in the shell of its outer wall. The ISS is a large satellite in space 1. scientists live to do scientific experiments. The first part of it 2. (put) into space in 1998. Last week, NASA warned astronauts on the ISS that air was 3. (slow) leaking out of the station. Astronaut Alexander Gerst and five other astronauts spent a lot of time 4. (look) for the leak. Mr. Gerst eventually found it and he put his finger over the hole. Luckily, the hole was only two millimeters wide, so it was not serious, but it did need 5. (fix).
The hole was in a Russian Soyuz MS-09 spacecraft. NASA said it could have been caused 6. a small piece of space junk. The ISS travels at 7.speed of around 28,000 kph. Even a tiny object 8. (hit) it can cause a lot of damage. Flight 9. (control) in the USA and Russia worked together with the crew to repair the hole.
A NASA official said the crew on the ISS are 10. (health) and safe after the repair.
高三英语语法填空中等难度题查看答案及解析
The astronaut did many experiments in the spaceship, ______ much help for knowing space.
A. which we think it is B. which we think are of
C. of which we think are D. I think which is of
高三英语单项填空简单题查看答案及解析
After Yang Liwei succeeded in circling the earth, Chinese astronauts __________ walk in space.
A.anxious to do | B.eager for | C.are dying to | D.are longing to |
高三英语单项填空中等难度题查看答案及解析