It is not clear whether the increase in reports is stemmed from greater human activity or is simply the result of more surveys.

admin2005-07-06  65

问题 It is not clear whether the increase in reports is stemmed from greater human activity or is simply the result of more surveys.

选项 A、flows
B、comes
C、derives
D、originates

答案D

解析 stem from源于。flow流动,循环;come来;derive得到;originate源自,来自。故答案为D。
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