题型：阅读选择 题类：模拟题 难易度：困难
广西南宁市2020年中考英语全真模拟卷（十二）（音频暂未更新）
What's a spacewalk? Any time an astronaut gets out of a spacecraft(航天器) while in space, it is called a spacewalk. Astronautsgo on spacewalks for many reasons. For example, experiments can be placed on theoutside of a spacecraft. This lets scientists learn how being in space affects(影响) different things. By going on spacewalks, astronauts can also fix thingsinstead of bringing them back to the earth to fix.
When astronautsgo on spacewalks, they wear spacesuits to keep themselves safe. Inside spacesuits,astronauts have the oxygen(氧气) they needto breathe and the water they need to drink. To keep the astronauts and the spacecraftsafe, the astronauts must leave and go back to the spacecraft through a specialdoor. When on a spacewalk, astronauts use safety tethers to stay close to theirspacecraft. Tethers are like ropes, connect the spacewalkers with the spacecraft.They keep astronauts from floating(漂 浮) away into space.Another way astronauts stay safe during spacewalks is by wearing a SAFER. SAFERis worn like a backpack. It helps an astronaut move around in space.
How doastronauts train for spacewalks? One way is by going for a swim. Floating in spaceis a lot like floating in water. Astronauts practice spacewalks underwater in ahuge special swimming pool. For every one hour they will spend on a spacewalk, astronautsneed to train seven hours in the pool. Another way astronauts practice for a spacewalkis by using virtual reality(虚拟现实). It looksand feels just like a spacewalk.
Today,only three countries have finished spacewalks independently. They are Russia, theUnited States and China. The first person to go on a spacewalk in the world wasAlexei Leonov from Russia. Zhai Zhigang is the first Chinese astronaut to go ona spacewalk. The world record of spacewalks is held by Russian astronaut AnatolySolovyev. He has been on 16 spacewalks and spent more than 82 hours outside in space.
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What if there's an accident during the game and the athletes need first aid? Drones (无人机) can be used to send things over. They can fly as far as 20 kilometers and travel16 meters in one second. Using a drone saves about 60percent of the time, according to the drone maker Antwork Medicine, blood and other things needed for first aid can be sent to people quickly.
Say that you are in Hangzhou and going to watch one of the events. It will be sad if you can't find your way. Augmented Reality (AR, 增强现实) is here to help. There's a mini program called the Hangzhou Asian Games AR service. You simply turn on your phone's camera and it will see where you are and then show you the way. You can also get more information about the stadiums as you walk by.
Want to walk around at the stadiums but can't make it in person? You can try the Hangzhou Asian Games' metaverse (元宇宙)! There's a mini program on Alipay. inside, it's like an online cartoon world. You can see the stadiums both from the outside and inside. Also, you can have your own character in the metaverse. You can choose clothes for your character who is able to "run around" the stadiums and even talk with other online users. |
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