There are___kinds of planets in our solar system. A. two B. three C. four D. five 相关知识点: 试题来源: 解析 B。本题考查太阳系中行星的种类。太阳系中的行星分为三类:类地行星、巨行星和远日行星。所以答案是 three。选项 A two 是二,种类错误。选项 C four 是四,种类错误。选项 D five...
根据第一段中的"We know that they come in all kinds of colors and sizes. Some of the planets appear to be red or blue, and they can be much bigger than Jupiter" 可知,此处的"them"指的是"planets",故选B。 2. 推理判断题。根据第二段中的"A number of the far-off planets seem to be...
A.Theories of how the universe evolved B.Similarities between the planets in the solar system C.Reason for the high density of earth D.Theories of the origin of the Moon 点击查看答案 第4题 These days a green building means more than just the color of the paint. Green building ca ...
The sun and its planets are called the solar system(太阳系), and our solar system is a small part of a much larger group of stars and planets , called the Galaxy(银河)or the Milky Way(银河系). There are over 200 billion (5) in the Galaxy, and our sun i...
The planetary-formation from the gas-and-dust disk surrounding a new star as described above has also raised the question of whether the process itself depletes stars of the elements that are concentrated in the planets. If so, this could be used to improve our planet-searching abilities, as...
4 What is this passage mainly about? A. Different kinds of solar systems. B. The amount of moons orbiting planets. C. Objects related to Sun. D. Space objects in our solar system. 相关知识点: 试题来源: 解析 4.D主旨大意题。本文主要介绍太阳系中的空间物体。故选D 。
Even within our solar system, massive distances make travel timely and difficult to plan. With current technology, it would take us a century to reach Alpha Centauri.(opens in a new tab) We don’t have a spaceship that can go faster than the speed of light; the fastest speed we can ...
For example, the sun and the planets circling it are called the solar system. The period of time in which the earth circles the sun once is a solar year. The moon takes one lunar month to circle the earth. A lunar year of twelve lunar months is eleven days shorter than a solar year...
Why are colonies that develop on a heavily seeded plate smaller than the same kind on a sparsely seeded plate? Explain. How do you think the formation of Earth was similar to that of other planets in the solar system, and how may have it been different? Explain in detai...
For example, the sun and the planets circling it are called the solar system. The period of time in which the earth circles the sun once is a solar year. The moon takes one lunar month to circle the earth. A lunar year of twelve lunar months is eleven days shorter than a solar year...