is it enough to have survieved for a long time 为什么用have done?

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is it enough to have survieved for a long time 为什么用have done?

is it enough to have survieved for a long time 为什么用have done?
is it enough to have survieved for a long time 为什么用have done?

is it enough to have survieved for a long time 为什么用have done?
因为for a long time 是一个长的时间段 所以需要

它已经生存了很长时间,是否足够了? 是它足够长期生存了 已经生存了很长时间是很足够的了 它足够生存了很长的时间吗?