题型:阅读选择 题类:真题 难易度:困难
四川省自贡市2020年中考英语试题(含听力音频)
When it comes to long-distance space travel, the biggest problem is that spaceships can only get as far as the fuel onboard allows. In 1964, a British writer Clarke came up with the idea of "solar sailing "in his science fiction. He wrote of large, mirror-like sails that collect power from the sun and free spaceships from the limitation of fuel.
This sci-fi idea was first successfully brought to reality (现实)in 2010 by Japan's IKAROS satellite. Ever since then, the technology has improved mission by mission, with the latest being NASA's Advanced Composite Solar Sail 3 (ACS3).NASA has recently announced that it's going to team up with Lithuania's satellite-building company NanoAvionics to test its new sail in low-Earth orbit.
To many, a solar sail (太阳帆) may look like a giant solar panel (太阳能电池板), but it actual works very differently. While solar panels take in energy from the sun and change it into power solar sails use photons(光子) given off by the sun to create direct power. Besides, solar panels are big and heavy to carry, while solar sails are just the opposite.
According to Abbott, the CEO of NanoAvionics, the upcoming low-Earth orbit trial with NASA, if successful, will be followed with deep-space missions that involve larger solar sails. These are ideal for low-cost and long-distance space travel because fuel will no longer be a problem.
"It started as a sci-fi dream, "Popular Mechanics reporter Jennifer Leman wrote. "Now it could be the future of space flight."
要求:
1、不得出现真是的校名、人名;
2、必须包含图表中的所有内容,并适当进行拓展;
3、字数:100次左右(首句不计入字数)。
percentage | TV shows | Reasons |
60% | talk shows and talent shows | interesting; good way to relax… |
20% | game shows | enjoyable; learn a lot |
15% | sports shows | Exciting; … |
5% | news | educational; … |
I | … |
We did a survey about "My Favorite TV Shows" last week. Here are the results.
试题篮