If said there were about 500 000 visitors flocking to the city for the 3rd International

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If said there were about 500, 000 visitors flocking to the city for the 3rd International Avation and Aerospace Exhibition, that would be a ______ estimate--in fact there are probably a lot more.

A.constructive

B.conservative

C.affirmative

D.progressive

热搜:低压电笔的测量范围为500伏以下对吗