【单选题】 It is not clear whether the increase in reports is stemmed from greater human activity or is simply the result of more surveys.
A.flows
B.comes
C.derives
D.originates
网考网参考答案:D
网考网解析:
flow流淌;come来;obtain获得;originate源于。因为stem原意是指“茎”,stem from意为“根源于”,故选D项。
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