A、Academic journals
B、Monographs
C、Movie comments
A、Research articles
B、Graduation papers
C、Science news
A、 Conference A
B、 Conference A +
C、 Conference C
A、 Review articles
B、 Science fictions
C、 Research articles
A、 They can be both written by one researcher.
B、 They can be both primary research.
C、 They can be written both by university students.
A、 Being genuine
B、 Being costly
C、 Being scientific
A、 Publishing product specification
B、 Agricultural product specification
C、 Industrial product specification
A、 National standards
B、 International standards
C、 Technical standards
A、 In terms of amount of money
B、 In terms of contents
C、 In terms of scope of circulation
A、 INTERIM reports
B、 DOE reports
C、 AD reports