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People have learned a lot fromstudies.
A.scienceB.scientific
C.scientistD.sightseeing
B

试题分析:句意:人们已经从科学研究学到了很多。分析选项音标与词意:A. science['sa??ns] 科学;B. scientific[sa??n't?f?k]科学的;C. scientist ['sa??nt?st] 科学家;D. sightseeing['sa?tsi???]观光。联系句意为科学的研究,因此运用形容词形式。故选 B
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