题目内容
Which type do the six letters belong to?
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Gather information of the writers of the letters and their daughter.(填写对应序号)1.Father's name:2.Father's occupation:3.Father's location:4.Mother's name:5.Mother's occupation:6.Mother's location:7.Time for father and mother to writer and read the letters:8.Daughter's name:9.Daughter's occupation:10.Daughter's location:11.Time for daughter to writer and read the letters:
1.下列行为中，属于经济学上的投资的是（ ）
2.下列行为不属于投资的是：
IS曲线斜率，下列说法正确的是（ ）。
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