题目内容
(请给出正确答案)
[主观题]
According to the passage, which of the following words best describes the efforts of the m
arine biologists working with oysters?
A.Persistent
B.Intermittent
C.Traditional.
D.Fruitless.
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A.Persistent
B.Intermittent
C.Traditional.
D.Fruitless.
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