单项选择题

Marginal product of labor is the increase in the amount of output from an additional unit of labor. A.
right. B.
wrong.

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多项选择题
Depression can have a lot of different symptoms, including ________. A、loss of interest in things you’d normally enjoy B、feeling worthless or excessively guilty C、sleeping either too much or too little D、recurrent thoughts of suicide
不定项选择
‍普通股股东的清偿顺序在优先股股东之前。‏<b
A．正确
B．错误
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