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牡丹皮具有的功效是
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Jason writes a weekly column in his school's newspaper about movies he has seen, books he has read, and concerts he has attended. His column provides information and opinions. Feedback from his fellow students is positive, and they are appreciative of the advice that is given. Which of the following would be the most apt(恰当的) description of the role played by Jason?
赤芍具有的功效是
For a high school student, Tim is highly concerned about environmental issues. He is a strong supporter of the garbage recycling and afforestation campaigns taken up by the environmental activists in his neighborhood. He wants to become a full time volunteer for their upcoming wildlife protection program and has even saved money to contribute to the cause. This group of environmental activists can be categorized under which of the following reference groups?
Joe is a computer service technician. People in his neighborhood usually depend on his suggestions for purchasing any computer accessory or hardware, as they believe that he has access to far more information on computer technology than the average consumer. The neighbors are also aware that Joe has the required knowledge and background for understanding the technical properties of the products. Within this context, Joe can be called a(n) ________.
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