19 _ _ _40 100(16)1(1)()(2)()(3)()(4)()(5)()(6)()2(1)()(2)()()(3)()(4)()(5)()12080()2()3()to zu()“”()“”“”()()jing ln()()65 1(4)2(4)3_(8)4()(4)ABC5(8)_ 1.(2)(3)(4)(5)2(1)(2)(4)1.B2.A3.B1.234A5