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...
system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. 9.According to paragraph 5, which of the following is indicated by studies of the mixture holding the inclusions ...
system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. 7.According to paragraph 4, all of the following are true about the minerals found in the refractory inclusions ...
system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. 9.According to paragraph 5, which of the following is indicated by studies of the mixture holding the inclusions ...
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 ...
system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. 6.According to paragraph 3, what does the presence of grains inside some of the chondrules indicate?
system composition, except for the most volatile elements; they are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled. 6.According to paragraph 3, what does the presence of grains inside some of the chondrules indicate?
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:C 题目解析: 登录后才能查看题目解析,还没有账号?马上注册 本文生词0 显示文中生词 ...
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 ...