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How much do you know about the solar system?The following passage will tel you something about it.The Earth is a planet. It as well as seven 1planets goes around the sun. We 2 the eightplanets and the sun the solar system. The first planet,the sun,is Mercury(水星).It is 58 ...
—How many (行星) are there in the solar system? —There are eight.相关知识点: 试题来源: 解析 planets 【详解】 句意:——太阳系中有多少行星?——有8个。根据中文提示,表示“行星”应用名词planet。空前有“How many”,How many+可数名词复数,表示有多少,此处名词用复数形式,故填planets。反馈 收藏 ...
The gravitational pull will consequently be weakened and the orbits of the remaining planets in the Solar System will begin to drift outwards. Perhaps Earth will make a lucky escape. All the while, the Sun’s core will get smaller and hotter, until 12 billion years after its formation, a ...
Standard planet-formation models have been unable to reconstruct the distributions of the Solar System's small, rocky planets and asteroids in the same simulation. A new analysis suggests that it cannot be done.doi:10.1038/nature16322Tsiganis, Kleomenis...
the other parts, matter at the perimeter was pulled toward the center. whereas matter in the center, because it was pulled equally from each side, did not move at all, and thus the nebula contracted with the greatest concentration of matter occurring in a central region called the protosun....
1. What did the underlined word “fake” in the first paragraph mean in Chinese?___2. What can we infer from the first paragraph of the passage? (根据提示完成回答,每空一词。)On April Fool’s Day, it’s not ___ ___ everyone to ___ being ___.3. Why did students set chickens...
The solar system has inner and outer layers, the inner being made up of the sun, Mercury, Venus and Earth, and the outer being made up of Mars, asteroids and miscellaneous space debris. Although these planets are light-years away from each other, each pl
deep ideas of cosmology through Hawking's book A Brief History of Time, and found myself inspired. To his readers Hawking revealed a whole new world—showing howphysicscan address some of the deep questions of our existence, all the way to the deepest of all: how did the universe begin?
The earth is a planet.It as well as seven ___ planets goes around the sun.We ___ the eight planets and the sun the solar system.The first planet,___ the sun,is Mercury(水星).It is 58 million ___ from the sun.Venus(金星)is the second planet next to the sun,and ___ planet,...