《2025年情景导学高中英语选择性必修第四册外研版》

Ⅱ. 七选五
When thinking about placing a human being in space, one of the most important questions is how to design special clothing needed to protect the person from the space environment. 1 The cold of space will freeze skin in a short time. The fierce heat of the Sun can cause severe burns. The lack of the atmosphere can cause gases in the body to expand and even burst. With no oxygen to breathe, a human being will die in only a few minutes. In addition, radiation from the Sun is another risk in space. So is damage from small pieces of rock and objects like meteors (流星).
In the 1930s, an American pilot, Wiley Post, designed one of the first successful devices to protect a pilot at extreme heights. 2 This protective suit permitted Mr Post to fly very high. In the 1960s, some astronauts' clothing was similar to that invented by Mr Post.
3 It lets them move, do useful tasks, and stay outside their spacecraft in comfort and safety for several hours. The spacesuit is called the Extravehicular Mobility Unit (EMU). It was designed to endure longer and to permit more movements than earlier spacesuits. The EMU has a number of parts that an astronaut can link together by using only one hand. The different parts are in different sizes. 4
Scientists are also considering the kind of spacesuits that would be needed for the exploration of 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. 5 And, they must be easy to repair and keep clean during a longer flight to and from Mars.
A.But this was not yet possible in the 1930s.
B.Today, astronauts wear very different protective clothing.
C.Special spacesuits have been used for the exploration of Mars.
D.It was a large device that looked like a can surrounding the pilot's head.
E.This makes it possible for each astronaut to select the parts that fit correctly.
F.A person cannot work in the extremes of space without different kinds of protection.
G. They may also have to protect astronauts from dust carried in the winds on Mars.

答案： Ⅱ. 1-5 FDBEG