梯形图转化为语句表：

    ：         步序         助记符        操作数    

                   0            LD            X0

                   1            MC            N0

                   2                          M0

                   3            LD            X1

                   4            OUT           Y1

                   5            LD            X2

                   6            OUT           Y2

                   7            MCR           N0