The expressio"the ups and downs" iPara 4 means _________.
· present and past situations
· good and bad experiences
· chances and challenges
· happy and sad feelings
出自:运营管理

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块