\(CFG\)的分析树例如语句\[(1)E\rightarrowE+E\\(2)E\rightarrowE*E\\(3)E\rightarrow-E\\(4)E\rightarrow(E)\\(2)E\rightarrowid\\\]graphTB a1(E)-->a2("-") a1(E)-->a3(E) a3(E)--&g