Thousands of years ago,human beings have been able to communicate
A. orally
B. using cave paintings
C. using books
D. using papyrus
查看答案
Which country invented paper first?
A. China
B. German
C. France
D. England
The first two scientific journals began publication in 1665 in ( )
A. China
B. German
C. France
D. England
An acceptable primary scientific publication must be ( )
A. the first disclosur
B. sufficient information
C. susceptible to sensory perception
D. essentially permanet
Follow this advice,You Don't ( )
A. copy answers from another student
B. ask another student to do your work for you
C. fabricate results
D. use electronic or other devices during exams
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