Generally, ______ (romance) poems depend on subjective imagination, while _______ (reality) poems focus on objective portrayal.
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Too much stress may lead to __________ (biology) and _________ (psychology) disorders.
The social phenomenon can be analyzed from ______ (history), ______ (economy) and _________ (politics) points of views.
The paper conducts a ______ (system) and ________ (logic) research on how to enhance college students' language competence.
请归纳出校园中喜鹊、水绵、樟子松、蚊子、小家鼠的共同特征。