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【单选题】
在甲和个人,X和Y两种商品的经济中,达到生产和交换的全面均衡发生在A.
MRTxy=Px/Py;
B.
甲与乙MRSxy=Px/Py;
C.
( MRSxy )甲=( MRSxy )乙;
D.
MRTxy=( MRSxy )甲=( MRSxy )乙
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皮皮学刷刷变学霸
举一反三
【单选题】I twisted my ankle three days ago, but I’m still in _______.
A.
agony
B.
affirm / affirmed
【单选题】听力原文：M: Today is a bad day for me. I fell off a step and twisted my ankle. W: Don't worry. Usually ankle injuries heal quickly if you stop regular activity for a while. What does the woman suggest the...
A.
Give his ankle a rest.
B.
Go to a doctor.
C.
Be careful when walking.
D.
Continue his regular activity.
【简答题】槟榔肝的发生原因是
【简答题】矩阵A的属于不同特征值的特征向量线性无关． 矩阵A的属于同一特征值的特征向量必线性相关？
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