在1,2,3,4,5,6,7,8,9,10,这10个数面前添上正号或符号
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![在1,2,3,4,5,6,7,8,9,10,这10个数面前添上正号或符号](/uploads/image/f/3184418-2-8.jpg?t=%E5%9C%A81%2C2%2C3%2C4%2C5%2C6%2C7%2C8%2C9%2C10%2C%E8%BF%9910%E4%B8%AA%E6%95%B0%E9%9D%A2%E5%89%8D%E6%B7%BB%E4%B8%8A%E6%AD%A3%E5%8F%B7%E6%88%96%E7%AC%A6%E5%8F%B7)
音阶排列是固定的,哪个调的哪个音在几弦几品是不变的.3(Mi)在第二品,4(Fa)就在第三品;7(Xi)是空弦音,1(Do)就在该弦的第一品,这是因为3和4之间,以及7和1之间是半音.其它各音之间要隔
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9无论加还是减8都为奇数加或减7为偶数偶数加减偶数6为偶数偶数加减奇数5为奇数奇数加减偶数4为奇数奇数加减奇数3为偶数偶数加减偶数2为偶数偶数加减奇数1为奇数因为20不是奇数所以无解
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