题目内容
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[主观题]
It is implied in the passage that ______.A.many scientists had known dinoflagellate before
It is implied in the passage that ______.
A.many scientists had known dinoflagellate before 1988
B.there had been no such organisms before 1988
C.many scientists were in doubt about the nature of the organism in 1988
D.no scientists knew anything about the organism in 1988
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