ADOPT
发表于 2025-3-25 03:52:47
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金桌活画面
发表于 2025-3-25 07:39:17
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photophobia
发表于 2025-3-25 12:27:26
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多产鱼
发表于 2025-3-25 17:49:09
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烧瓶
发表于 2025-3-25 23:13:42
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CULP
发表于 2025-3-26 01:53:00
Radiation Sources and Dosimeters,(e.g., International Atomic Energy Agency, 1960, 1973c; Attix, 1967; Spurny and Sulcova, 1973). Sparrow (1960) discussed the uses of large sources in botanical research and cited many references on sources utilized by investigators.
我要威胁
发表于 2025-3-26 07:17:15
Miscellaneous Techniques and Equipment, and documented in the bibliographies of Bingelli, 1963, 1965, 1967, 1969). Citing 110 references, DeWitt (1978) summarizes the application of isotopes in investigations of air, soil, and water pollution and concludes:
使迷惑
发表于 2025-3-26 11:55:12
Introduction, following this date that extensive contributions were made to the biological and physical sciences that utilize tracer technologies. Today, it would be unusual for an academic institution or a research laboratory not to utilize radionuclides to some degree. One objective of the U.S. Atomic Energy C
绝食
发表于 2025-3-26 14:12:26
Dating Techniques,termine the age of rocks and minerals. The primordial radionuclides such as potassium, rubidium, thorium, and uranium are very long-lived; consequently, their application to geological dating must of necessity be restricted to measurement of long time intervals. W. F. Libby suggested that the cosmog
地牢
发表于 2025-3-26 20:52:35
Neutron Activation,gh-energy photons, or charged particles, stable elements can be transformed to radionuclides. These radionuclides can be measured relatively easily, and the results can be interpreted in terms of the type and quantity of stable elements present in the sample of interest. Although several types of bo