練習三CDBBAB
練習四DABCAD
練習五ABCDC
練習六CDEFAB
練習七BCAAD
練習九DCADABBC
練習十一BDACCADDBC
練習十三CEDBA
練習十四FACDBE
練習十六DCCD
練習十九DBBCBA FFTTF
練習二十GFHCBDEA
練習二十一CCDAB
練習二十二CDBEA
物理練習一ADADDCCCCA
練習二BDCDABD
練習三ACBCBAB
練習四DADBDCBCCCDAABA
練習五CCCADCBC
練習六CCAABAAACBABD
數學練習一BDACBA
練習二DBBACA
練習三ACD
練習四BBCA
練習五DBDA
練習六CBDCD
練習七ADA
練習八CBBA
練習九DC
練習十D
練習十一BCD
練習十二DDDC
練習十三BCABD
練習十四DABDDDD
練習十五DDBA
練習十六DBCBC