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【简答题】
视觉平衡的两个主导因素: 重力 和( )。
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【多选题】反映国际贸易地理方向的指标有( )
A.
各国的出口额占世界出口总额的比重
B.
各国的进口额占世界进口总额的比重
C.
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D.
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E.
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