The preponderance of studies on aqueous uranium (U)—including a 1997 study by Moran et al.—were in oceanic contexts. In a 2020 investigation of factors influencing the abundance of the isotope U-238 in Xiligou Lake and three other lakes in northwest China, Zhao et al. therefore aimed to address the relative __________ of scientific knowledge on uranium isotopes in inland bodies of water.
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Verbal·Craft and Structure·Words in Context
mediumWhich choice completes the text with the most logical and precise word or phrase?
A
aggregation
B
obsolescence
C
diminution
D
dearth