1. (2021高一下·桂林开学考) 阅读理解

Our skies are filling up with satellites (卫星). Starting in May 2019, the firm SpaceX has deployed (部署) around 700 Starlink satellites into Earth orbit (轨道) over 11 launches. SpaceX plans to deploy 12000, and perhaps later 42000, satellites with the aim of providing access (使用……的机会) to the entire world.

These satellites have the promise to change the way that the night sky looks. For comparison, there are 2600 satellites currently orbiting Earth. These days, spotting (发现) a few satellites in the sky is still an exciting activity.

There are many online tools available to predict when you might get a glimpse (一瞥) of a Starlink satellite. One, called Find Starlink , takes your location (位置) and tells you what time and where in the sky to look. Even with the help of a tool it can still be a game of chance, but if you try a few times, you will eventually see something.

To get the best chance of seeing a Starlink satellite, pick a clear night. Try to get away from light pollution by going to a park or an open field, for example. Let your vision (视力) adjust to (适应) the darkness, then keep an eye out for moving sources of light in the sky. Satellites are only visible (可见的) when they reflect (反射) sunlight back to Earth. Because of this, the best time to look is just after sunset or just before sunrise, when sunlight is still reflecting off the satellites but it is dark enough to see them.

If you can't tell whether you are looking at is a satellite or something else, there are a few simple rules to tell the difference. If a point of light is steady (稳定的) and not moving compared with everything else, it is a star. If it is a bright light moving slowly compared with the stars, it is a planet. If it is a bright flash moving extremely quickly across the sky in seconds, it is a meteor (流星).

1. （1） Why does the firm SpaceX plan to send more satellites into space?

   A . To change the view of the night sky. B . To offer more exact location data to the army. C . To provide information for scientific research. D . To make Internet available to the whole world.
3. （2） To see a Starlink satellite better, what should we avoid?

   A . Choosing a clear night. B . Staying away from light pollution. C . Looking at moving light after sunrise. D . Making your eyes used to the dark sky.
5. （3） What is it if a light point is steady and not moving compared with a building?

   A . A star. B . A planet. C . A meteor. D . A plane.
7. （4） Which of the following is True according to the passage?

   A . SpaceX has launched 11 Starlink satellites onto Mars. B . Satellites are only visible when they take in sunlight. C . The best time to look at satellites is before sunrise as well as after sunset. D . There are many ways available for people to spot a Starlink satellite online.