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【单选题】
如果边际消费倾向为 0.7 ,投资支出增加 60 亿元,这将导致均衡收入 GDP 增加( )A.
20 亿元
B.
60 亿元
C.
180 亿元
D.
200 亿元
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She concerned herself with current social problems.
B.
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C.
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D.
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feeling
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