有一位青年曾信誓旦旦地告诉爱迪生,他要发明一种“万能溶解液”,它能溶解任何物质。爱迪生听后,问道:“那你准备用什么来装这种万能溶解液呢?”这位青年一时语塞,不知如何回答。所谓的“万能溶解液”是()
A.空概念
B.性质概念
C.集合概念
D.负概念
正确答案是A
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