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1. No matter where we live on the planet, we always end up running out of environmental resources.
2. We live on the earth, so we must take care of our homeland.
3. We live on the earth, and we must take care of small animals.
4. Because we live on the earth, we have to protect the environment.
5. We live on the earth, and we need to save water.
6. We live on the earth, and we must continue to develop science and technology to explore the mysteries of the universe.
7. We live on the earth, so we need to protect "Mother Earth".
8. We live on the earth, and the earth is our common home, and we must cherish it.
9. We live on the earth, and the beautiful scenery of the earth must be protected.
1. Earth: Earth is one of the eight planets in the solar system (Pluto was classified as a dwarf planet in 2006 because its trajectory is different from the other eight planets), and it is ranked third in order of being from the sun. It has a natural satellite, the Moon, and the two form a celestial system, the Earth-Moon System.
Earth, as a planet, originated from the primordial solar nebula 4.6 billion years ago. The Earth interacts with other celestial bodies in outer space, including the Sun and the Moon. The Earth is home to millions of living beings, including humans, and is the only celestial body in the universe where life is known.
The radius of the Earth's equator is kilometers, the polar radius is kilometers, the average radius is about 6,371 kilometers, the equatorial circumference is about 40,076 kilometers, and 71% of the earth is oceans; 29% is land. The reason why the Earth appears blue when seen from space is because the sky is another level of the Earth and is covered by seawater. The Earth is a large magnet, and through the north and south poles, the magnetic field can extend all the way to the Earth and beyond the altitude of more than 100,000 kilometers.
The Earth is made up of the Earth's crust and mantle and its core, the temperature of which varies with depth, reaching 4,500 to 5,000 degrees Celsius at the center of the Earth at a depth of 6,371 km. The Earth is not a complete sphere, it is an ellipsoid. The circumference of the Earth's equator is comparable.
2. Universe: The universe is the general term for all things, the unity of time and space. The universe is a material world, which exists objectively and does not depend on human will, and is in constant motion and development, with no beginning and no end in time, no boundary and no end in space.
The universe is diverse and unified; diversity in the diversity of material manifestations; Unity lies in its materiality. The universe is a unity of space, time, matter, and energy. The age of the universe is about 100 million years.
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We humans live together on one planet.
We, human beings, and all living beings in the world live together on the same earth.
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We live on a clean earth.
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Greedy, we live on a planet that is about to be exhausted.
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We want to protect, we want to protect our mother earth.
Talk about entertainment: According to Genesis 11 in the Bible, the Tower of Babel was built by mankind in the hope of leading to heaven. In order to stop the human plan, God made the human beings speak different languages, so that the human beings could not communicate with each other, and the plan failed, and the human beings scattered from then on. >>>More
It's okay to be nice to yourself. Don't think about it so much. If you feel that the one you love is not as good to you as the one who loves you. >>>More
That's not to say that you're at a loss, the female junior holds the gold brick, maybe you meet a more mature and beautiful girl, it's okay.
Physics questions? I guess I think it's about gravitational acceleration. >>>More
First of all, when the object is infinitely high according to f=gmm r 2, its gravitational pull is very small and almost equal to 0, so it may not fall towards the Earth. Also, even if it falls to the earth, the speed will not be infinite, and the speed will not exceed the speed of light. Your question itself is problematic