A-A+ At this stage at least one on-the-spot survey 2022-08-01 21:55:45 问答库 阅读 167 次 问题详情 At this stage at least one on-the-spot survey has to be conducted in person to assess the local situation and establish distribution.请帮忙给出正确答案和分析,谢谢! 参考答案 正确答案:EE