单项选择题

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
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The majority of people around here are decent people.
A. honest
B. rich
C. good- looking
D. high- ranking
单项选择题
The scientists began to accumulate a huge mass of dat
a.A. build upB. put upC. make upD. clear up
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