细心计算/N;F2a;I(P/j3d,P
9.57－（2.57＋3.38）―2.62/N;F2a;I(P/j3d,P
算式：提示'|5b'j'Y,o2H/?,b/N;F2a;I(P/j3d,P
=8r3[9c/N;F2a;I(P/j3d,P