Whatarethekeyfeaturesofaresearchpaper?
A :It is based on extensive research of proven facts and authoritative testimony.
B:The author ’s voice tends to be objective and neutral.
C:The style tends to be formal.
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_______isknowntoall，Chinawillbean_______powerfulcountryin20or30years’time.
Tounderstandthesentence,youshouldanalyzeitsparts________.