modified
A.expanded
B.modified
C.gained
D.melted
A.expanded
B.modified
C.gained
D.melted
A、title, author(s), key words, main body, conclusion, acknowledgement, references
B、title, author(s), key word, main body, conclusion, acknowledgement, reference
C、title, author(s), key words, main body, conclusion, acknowledgements, references
D、title, author(s), key words, main body, conclusion, acknowledgement, references
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