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题型:阅读理解-单选 难度:0.65 引用次数:63 题号:22187215

Space junk is a danger to the satellites and may hurt astronauts. There are tens of millions of pieces of rubbish in space. Some of the pieces are from passing comets, but most of them are from large broken satellites and rockets after they stopped working.

Though satellite technology offers some advantages to people, the increasing use of it could make large areas of Earth’s orbit into bad condition. The space closely around our planet is becoming increasingly crowded with over 9,000 satellites in orbit today, and the Eastern Southern Observatory (ESO) shows that this number may grow to 75,000 by 2030.

As Space.com reported in October 2022, the International Space Station (ISS) had to think about how to keep clear of a piece of space junk from a broken Russian satellite in 2021. In November 2021, astronauts in the ISS had to stay inside their spaceship when the space station passed close to space junk.

NASA scientists have called for an agreement to make sure “space junk” doesn’t make the activities in Earth’s orbit into trouble and they are working on it. “Satellites are important to the people and Earth itself. However, using too much space will put our planet into a dangerous situation,” said Melissa Quinn, Head of Space port Cornwall. “I hope all countries need to pay attention, to understand the importance of the next step, and to work together, to keep the problem under control.”

1. The underlined word “it” in Paragraph 2 refers to ________.
A.spaceB.EarthC.rubbishD.satellite technology
2. The report in Paragraph 3 mainly shows that ________.
A.the Russian satellite has just badly broken
B.a piece of space rubbish can be very dangerous
C.the main job of the ISS is to collect the space junk
D.space rubbish is everywhere around the space station
3. Which of the following is True according to the passage?
A.Most of space junk are pieces from passing comets.
B.There may be 75, 000 satellites in the earth orbit by 2030.
C.NASA has already kept the “space junk” problem in control.
D.Scientists think the space junk won’t hurt astronauts any more.
4. The writer wrote the passage to tell us ________.
A.it’s time to do with space junk problemB.it is dangerous to work in space
C.broken satellites may become space junkD.there is much space rubbish in space

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Can anyone be an astronaut?

Of course not. You don’t have to have a science degree but most astronauts do. Most of them are pilots too. Life in a spaceship is hard so you must have a healthy body and mind. You need to be easy going, patient, and helpful to spend so much time in a small space with other people.

What’s the training like?

People have to train for a year to learn how to stay healthy and safe. They practise space walking and living in zero gravity. They train in difficult conditions to learn how to solve problems and to work in a team. Everyday tasks like eating, washing and sleeping can be difficult in a spaceship. There is no running water so you have to wash with wet tissues; it’s hard to enjoy the dry food that astronauts have to eat. And to sleep you must cover your eyes because the sun rises every 90 minutes on the International Space Station. You also have to tie yourself to something so you don’t fly away!

What health problems do astronauts have?

Life in zero gravity causes changes to our bodies. Bones and muscles(肌肉) become thin and weak so you must do a lot of exercise in space to stay fit and to help the heart move blood around your body. Astronauts often get backache because people grow in space-up to 8 centimeters! It’s also common to have headaches and to feel sick, especially at the beginning. You must have vitamins to take the place of fresh fruit and vegetables. But you don’t have to put on sun cream because space suits protect your skin.

Are you still interested?

So now you know. If you want to go to space, study hard, learn to fly and take care of your body and mind.

1. What is a must for an astronaut?
A.A science degree.B.A pilot’s license.
C.A healthy body and mind.D.A weak character.
2. What must you do to prepare for a space trip?
A.Experience zero gravity.B.Wash with running water.
C.Practise long walks.D.Sleep with your eyes open.
3. Why do astronauts have to exercise in space?
A.To make their bones and muscles thinner.B.To help the heart work well and keep fit.
C.To avoid backache and grow much taller.D.To stop their skins from getting sunburned.
4. What might happen to astronauts on the International Space Station?
A.Their skin will be injured.B.They can wash with running water.
C.They can eat a lot of fruit and vegetables.D.They may have headaches and feel sick.
5. What is the text mainly about?
A.What we need to know to become an astronaut.B.Why young people are interested in space trips.
C.What problems astronauts must solve in space.D.Why we need to train hard before a space trip.
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