单项选择题

Questions 22 to 25 are based on the conversation you have just heard.

A．A chemistry assignment.
B．A study that their chemistry professor did.
C．A class that the woman is taking.
D．A job possibility.

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1．有人认为收入差距的存在是合理的 2．有人认为收入差距的存在是不合理的 3．收入差距对社会的影响 On Income Gap

单项选择题

Questions 22 to 25 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。