According to the nebular hypothesis, the early Earth was formed from a rotating cloud of gas and dust called the solar nebula. Which of the following substances was most likely abundant in the early Earth? A. 样重主温下调切日天节样重主温下调切日天节Hydrogen and helium样重主温下调切日天节...
At one time it was thought that these matrix grains might be___nebular dust, the sort of stuff from which chondrules and inclusions were made. However, detailed studies of the chondrite matrix suggest that much of it, too, has been formed by condensation or melting in the nebula, although...
原文第四句说 chondrules 包含了 melting 之后剩下的颗粒，这些颗粒一定是在高温下 nebular dust were fused 的时候形成的，然后快速冷却，所以正确答案是 B。选项 A 说的是对的，但题目问的是 grains 表明什么，A 答非所问，不选；C 选项原文完全没提到；D 选项的 after 不对，原文用的是 when...
Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which ...
A.The Solar System is completely flat.B.Mercury and Pluto are not in the same plane with other planets.C.The planets formed from a nebular disc orbiting the Sun.D.The Sun formed out of the same nebular disc with its planets. 相关知识点: 试题...
11/14 According to paragraph 6, the composition of chondritic meteorites differs from the composition of the Sun primarily in A containing nebular matter B containing many fewer atoms of iron C the relative amount of volatile elements D the ratio of iron to silicon 解析...
Which of the following statements is NOT true according to paragraph 3 A. The Solar System is completely flat. B. Mercury and Pluto are not in the same plane with other planets. C. The planets formed from a nebular disc orbiting the Sun. D. The Sun formed out of the same nebular ...
Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which ...
Since practically all the solar system's mass resides in the Sun, this similarity in chemistry means that chondrites have average solar system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which ...
11.According to paragraph 6, the composition of chondritic meteorites differs from the composition of the Sun primarily in A. containing nebular matter B. containing many fewer atoms of iron C. the relative amount of volatile elements D. the ratio of iron to silicon 你的答案: 正确答案...