In 1933, an American flyer, Wiley Post, designed one of the first successful devices to protect a pilot at extreme heights. It was a large device that looked like a can surrounded the pilot's head. Astronauts in the American space agency (NASA) flew the first American space flights in the early 1960s. The clothing was similar to that invented by Wiley Post.
Today, astronauts wear very different protective clothing. It lets them move, do useful tasks, and stay outside their spacecraft in comfort and safety for several hours. The spacesuit is called the shuttle extravehicular mobility unit or EMU. It was designed to endure longer and to permit more movement than earlier spacesuits.
The EMU has a number of parts that an astronaut can link together by using only one hand, which makes it possible for each astronaut to select the parts that fit correctly.
Nowadays, NASA scientists are also considering the kind of spacesuits that would be needed for exploration on the planet Mars. Because of the gravity on Mars, spacesuits may have to be designed to be lighter than suits used in orbit or on the moon. The equipment may also have to protect astronauts from dust carried in the winds on Mars. And, they must be easy to repair and keep clean during a longer flight to and from the red planet.
28. Which of the following is NOT mentioned about the dangers of space environment?
A. Gases in the body.
【湖南省衡阳县一中2018届高三第二次月考英语试卷】相关文章:
★ 河南省天一大联考2017届高三上学期阶段性测试(三)(12月)英语试卷
★ 宁夏银川市唐徕回民中学2017-2017学年高一12月月考英语试题
★ 河北省蔚县第一中学2017-2017学年高一上学期期中考试英语试题
★ 河北省巨鹿县二中2017-2018学年高二第二次月考英语试卷
★ 内蒙古杭锦后旗奋斗中学2017-2018学年高二下学期期中考试英语试卷
★ 福建省闽清高级中学等四校2014-2015高二上学期期中联考英语试卷 Word版含答案
★ 陕西省宝鸡园丁中学2017-2017学年高一10月月考英语试题
★ 河北省承德一中2017-2018学年高二上学期第三次月考英语试卷
最新
2019-11-15
2019-11-15
2019-11-14
2019-11-14
2019-11-11
2019-11-11