我国《民法通则》第64条规定：“代理包括委托代理、法定代理和指定代理。

单项选择题在法律上，当某人A授权某人B代表A从事某种活动时，就发生了“委托―代理”关系。其中A代理人”，B委托人”。（）

单项选择题​25-28. Read the following statements and choose what kind of attention getter is used.‍ ​‍ ​‍ What if I told you that by some estimates, the cost of work-related stress in the US is close to 300 billion dollars annually? Workplace stress, the stress causing this massive impact, is related to productivity and wellness. And by the way, it’s linked to employee disengagement, chronic diseases that impact your work and work-related injuries and illness. And when you add up the cost of all five factors, it’s an estimated 2.2 trillion dollars annually. That represents 12% of our GDP. ‍ ​‍