The nature of solar-system formation explains why Earth contains all the elements needed for life, and it is why we expect these elements to be present on other worlds throughout our solar system, galaxy, and universe. Note that this argument does not change, even if we allow for life ...
Thus, planetesimals everywhere should contain the elements needed for life, which means that objects built from planetesimals planets, moons, asteroids, and comets also contain these elements. The nature of solar-system formation explains why Earth contains all the elements needed for life, and it ...
Thus, planetesimals everywhere should contain the elements needed for life, which means that objects built from planetesimals planets, moons, asteroids, and comets also contain these elements. The nature of solar-system formation explains why Earth contains all the elements needed for life, and it ...
Thus, planetesimals everywhere should contain the elements needed for life, which means that objects built from planetesimals planets, moons, asteroids, and comets also contain these elements. The nature of solar-system formation explains why Earth contains all the elements needed for life, and it ...
解析：待插入句：来回答“其他行星上是否存在生命?”“我们必须首先考虑生命的必要先决条件。
nature of solar-system formation explains why Earth contains all the elements needed for life, and it is why we expect these elements to be present on other worlds throughout our solar system, galaxy, and universe. Note that this argument does not change, even if we allow for life very ...
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定位原文第一段。Life on Earth uses about 25 of the 92 naturally occurring chemical elements 地球上的生命使用了92种自然存在的化学元素中的25种，对应B选项。
system, they are inevitably made from heavy elements because the more common hydrogen andhelium remain gaseous.Thus, planetesimals everywhere should contain the elements needed for life, which means that objects built from planetesimals-planets, moons, asteroids, and comets-also contain these elements....
Identifying structural elements needed for development of a predictive life- history model for pallid and shovelnose sturgeons. J. Appl. Ichthyol. 27, 462-469.— (2011a), “Identifying Structural Elements Needed for Development of a Predictive Life-History Model for Pallid and Shovelnose Sturgeons,...