什么叫中转运输？
参考答案：
中转运输是指利用公司现有班线无法直接实现从始发站到目的站的运输，需要经过中转站中转运货物的一种运输业务。
如果复数z适合|z+2+2i|=|z|，那么|z-1+i|的最小值是______．
股份有限公司与有限责任公司的异同点
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