选做
Ⅱ. Read the article about space stations and complete the notes.
Space stations are like houses in space for astronauts. They stay in space or in the Earth's orbit for a long time. In space, there is much less gravity than on the Earth. The astronauts float about and must tie themselves to something before they sleep.
Dirt also floats around and can get inside the equipment and damage the space station, so the astronauts have to be very clean, and have to put their rubbish in special bags. There is no air in space, so astronauts must wear special suits when they leave the space station. Astronauts cannot spend too long in space, as it is not good for their health. They must also do special exercise to stay fit (健康的). Valeri Poliakov, a Russian astronaut, holds the Guinness World Record (吉尼斯世界纪录) for the longest single space mission for 437 days.
Perhaps in the future, people will stay for even longer on space stations.
Exercise:
Space stations:
· They are like 1. in space.
· They stay in space or in the Earth's orbit for a long time.
· There is much less 2. in space than on the Earth.
Astronauts:
· They 3. about and must tie themselves to something before they 4. .
· They must be clean so dirt doesn't 5. the space station, and they must put their 6. in special bags.
· They cannot spend too long in space because it is bad for their 7. .
· They must wear special suits when they leave the space station.
· They do special 8. to keep fit.
· One Russian astronaut stayed on a space station for 9. days.

1. houses 2. gravity 3. float 4. sleep 5. damage 6. rubbish 7. health 8. exercise 9. 437

1. 根据"Space stations are like houses in space for astronauts."可知答案为houses。
2. 根据"In space, there is much less gravity than on the Earth."可知答案为gravity。
3. 根据"The astronauts float about..."可知答案为float。
4. 根据"...must tie themselves to something before they sleep."可知答案为sleep。
5. 根据"Dirt also floats around and can get inside the equipment and damage the space station..."可知答案为damage。
6. 根据"have to put their rubbish in special bags"可知答案为rubbish。
7. 根据"Astronauts cannot spend too long in space, as it is not good for their health."可知答案为health。
8. 根据"They must also do special exercise to stay fit."可知答案为exercise。
9. 根据"Valeri Poliakov...holds the Guinness World Record...for 437 days."可知答案为437。


翻译:
选做
Ⅱ. 阅读关于空间站的文章并完成笔记。
空间站对宇航员来说就像太空中的房子。它们会在太空或地球轨道上停留很长时间。在太空中，重力比地球上小得多。宇航员会飘来飘去，而且睡觉前必须把自己系在某个东西上。
灰尘也会四处飘浮，还可能进入设备并损坏空间站，所以宇航员必须非常干净，而且得把他们的垃圾放在特殊的袋子里。太空中没有空气，所以宇航员离开空间站时必须穿上特殊的宇航服。宇航员不能在太空中待太久，因为这对他们的健康不利。他们还必须做特殊的运动来保持健康。俄罗斯宇航员瓦列里·波利亚科夫保持着单次太空任务时长的吉尼斯世界纪录，时长为437天。
也许在未来，人们会在空间站上停留更长时间。
练习：
空间站：
· 它们就像太空中的1. 。
· 它们会在太空或地球轨道上停留很长时间。
· 太空中的2. 比地球上小得多。
宇航员：
· 他们3. ，而且睡觉前必须把自己系在某个东西上。
· 他们必须保持干净，这样灰尘就不会5. 空间站，而且他们必须把6. 放在特殊的袋子里。
· 他们不能在太空中待太久，因为这对他们的7. 有害。
· 他们离开空间站时必须穿上特殊的宇航服。
· 他们做特殊的8. 来保持健康。
· 有一位俄罗斯宇航员在空间站上停留了9. 天。