1700993013
4-32 (1)需燃料28.7kg; (2)需燃料117kg.
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4-33
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1700993018
第 五 章
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5-1 (1)6aλ; (2)
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5-2 各边中点构成的小三角形内心.
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5-3 (M+3m)g.
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5-4 不能.
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5-5 aC0=kl/(m1+m2),
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5-6 (1)略; (2)
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5-7
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5-8 略.
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5-9
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5-10
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5-11
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5-12
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5-13 4mR2.
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5-14
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5-15 IC+4ml2或IC+ml2.
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5-16
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