(40)(6)yyzizijjjinjinzhunzhunfifi 1tinjixioyrnrsco s yo kn jn qu w()2chn s mn yun guan b zhy zh hng xng ch qingli()1_2_3_4_ 1()ABC2()ABC3()ABC4()ABC5()ABC6()ABCD7()ABCD 1()2()3()4()5()(15)1_2_3_4._5_6_7_ 1()2()3()4()5()_(45)1(2)(1)_(2)_2(5)(1)_()ABCD(2)_3(2)_ 1_(4)2(4)(1)()(2)()(3)()(4)()ABCD3(3)_ 450 yzijjinzhunfi1.21.2341.A2.C3.A4.B5.A6.D7.C1.2.3.4.51.2345671.2.3.4.5.1.(1)(2)2(1)B(2)31.2(1)B(2)D(3)C(4)A3