Jacob Geer from UKSA told the BBC:"Space surveillance(监视) and tracking is one of the key things we can do to keep safe those satellites we rely on now, and to make sure certain orbits don't become inaccessible(无法接近的) for future generations because there's too much debris in them...
- **A. Unseen things**:泛指看不见的物质(如暗物质等),目前未被证实对太空环境造成具体负面影响,与题意无关。 - **B. Many big holes**:太空是真空环境,不存在实体“洞”的概念,表述本身不科学。 - **C. Too much space junk**:太空垃圾(失效卫星、火箭碎片等)因数量多且高速运行,严重威胁航天器...
Well, we all have a personal stake in this because burning carbon is the basis of life. We wouldn't be here if we ourselves weren't burning carbon. Basically, all living things burn carbon to survive. Usually this happens at the cellular level and what's burned is carbon in the form ...
What's That in the sky? 天空中是什么? My sister and I love to learn about all the beautiful things in outer space. 我的妹妹和我都学习关于我们外太空中美丽的事物。 What is outer space? Well, it's the space beyond the earth's atmosphere. 我们的太空是什么?它是地球大气以外的空间。 Las...
People who havesurivived plane crasheshave described time slowing down around them. When the human brain senses that seriously terrible things are happening, it starts to adjust the way it captures memories, taking in more things faster in order to make quicker decisions. ...
3. She decided to open an online shop(用适当的单词填空)she can sell some of her second-hand things.4. -Hey, Lily, what are you up to?—I a movie on TV and now I'm doing some reading. A. watch B. have watched C. am watching D. had watched5. -We have only one cinem a ...
What is happening to junk in outer space? A. It has caused serious pollution. B. The amount of it is increasing. C. It can be seen by people on the earth. D. It has influenced the launch of satellites.33. What are human beings doing with space junk? A. They have invented a ne...
When the human brain senses that seriously terrible things are happening, it starts to adjust the way it captures memories, taking in more things faster in order to make quicker decisions. When thinking back, a person will have a slower memory, because there is simply more than usual to ...
There are a wide variety of clothes available in clothes rental stores,including children's wear, formal attire, maternity dress, wedding dress, which are suitable for people of all ages and can be applied to any occasion. In addition, wh...
Campers enjoy a staff-to-child ratio ranging from 1:4 to 1:7 depending on the age group. Instructors are passionate educators who are experts in their fields and have undergone training and a background check. 21.On which of the following dates can you cancel your registration with a full...