High/Scope方案在教学方法上对教师提出了哪些原则和要求？
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We can infer from the passage that the book "Animal Spirits"______.
A. answers all the three questions about economic crisis
B. is written by a leading expert of economics
C. studies the forgotten work of economist Keynes
D. has been celebrated in the discipline
为什么半殖民地半封建社会中国革命的性质是资产阶级民主主义革命？
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