carbohydrate
发表于 2025-3-30 11:57:40
0068-0346 l, philosophical, and social realities. He is also, in C. P. Snow‘s words, strong, brave, and good (Variety of Men, N. Y. 1966, p. 19). In this preface, we shal978-90-277-1062-8978-94-009-8977-1Series ISSN 0068-0346 Series E-ISSN 2214-7942
exercise
发表于 2025-3-30 14:43:48
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内向者
发表于 2025-3-30 16:52:18
A New Method for the Liquefaction of Helium 20 K. Among all known gases, however, helium has the lowest boiling temperature. Helium liquefies at a temperature as low as 4.2 K. By letting it boil under a reduced pressure, however, a temperature of 0.8 K was obtained. Temperatures even closer to absolute zero were reached by using the magnetic
揉杂
发表于 2025-3-30 21:44:37
Oxygenot teach you technology or its foundation — namely, physics. Perhaps you have even forgotten most of the physics you studied in secondary school. For this reason I shall speak today not on a purely scientific subject but on more general matters — that is, about oxygen, and I shall tell you of the em
纤细
发表于 2025-3-31 03:04:43
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表状态
发表于 2025-3-31 05:15:27
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圣歌
发表于 2025-3-31 12:09:52
Energy and Physics The work performed by people now exceeds by many times their muscular work. For example, in the most developed countries the power from different energy sources is up to 10 kilowatt per person and this is at least 100 times greater than the average muscular power of one man.