Libido 发表于 2025-3-23 12:23:24

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藕床生厌倦 发表于 2025-3-23 17:11:24

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BLAND 发表于 2025-3-23 20:58:13

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上腭 发表于 2025-3-24 00:50:34

Physical Activity and Women’s Mental Healthny scientists anticipated that Venus and Mars would turn out to be basically similar to our own planet. One of the most important lessons of nearly 30 years of planetary exploration has been the realization that this expectation was wrong.

Arteriography 发表于 2025-3-24 05:20:00

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不自然 发表于 2025-3-24 09:40:15

Impacts on the Earth,tantial stuff, rather like a loose pile of sand or gravel. The idea that comets might have solid, rocky nuclei was not to emerge until 1950, and only in 1986 did the first spacecraft come close enough to a comet (Halley’s Comet) to photograph its solid nucleus.

直觉没有 发表于 2025-3-24 11:44:49

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Lice692 发表于 2025-3-24 17:09:10

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采纳 发表于 2025-3-24 20:46:50

Definitions and Basic Concepts,ional crisis is evident, the thousands of Soviet military and civilian workers at this space-age facility are alert, for they know that they would be among the first targets in a nuclear war. The very survival of their nation could depend on their quick response to a challenge from the American imperialists.

ensemble 发表于 2025-3-25 01:17:31

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查看完整版本: Titlebook: Cosmic Catastrophes; Clark R. Chapman,David Morrison Book 1989 Clark R. Chapman and David Morrison 1989 astronomy.catastrophe.physics