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ATP的结构式可以简写成:
A.A-P~P~P B.A-P-P-P C.A-P-P~P D.A~P~P~P
A.A-P-P~P B.A~P~P~P
C.A~P~P-P D.A-P~P~P
A.A-P-P~P B.A~P~P~P C.A~P~P-P D.A-P~P~P