X-ray diffraction
A、A=T
B、photographicprocess
C、aDNAbase
D、ringstructurecomposedofcarbonandnitrogen
E、shapeproposedbyWatsonandCrick
F、abaseplusasugarG:startofDNAreplicationH:smallpieceofDNA
发布时间：2025-11-17 13:33:39
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答案：B
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