?1?????????????????????????????
??a???b???c???d??
??2.????????????????????????????????????????????
??a???b???c???d????
??3.????????????????????????????????
??a???b???c???d??
??4.??????????????????????
??a???b???c????d???
??5.????????????????????????????
??a???b???c???d??
??6.???????????????????????
??a???b???c????d??
??7.??????????????????????????????
??a????b?????c?????d??
??8.????5???????????????????
??a???b???c???d???
???????
??1.?????????????????
??a?????????????????????
??b????????????
??c???????????
??d?????????????
??2.??????????????????
??a?????????????????
??b?????????????????
??c???????????????????
??d????????????????
??3.????????????
??a????????????
??b???????
??c??????
??d???????
??4.?????????????????????
??a???????????????????????????
??b????????????????????????
??c?????????????
??d?????????
??5.??????????????????
??a??????????????????????????
??b????????????????
??c??????????????????????
??d??????????????????????????????????
??6.???????
??a????????????????????????
??b??????????????????
??c?????????????????????????????
??d??????????????????????????????
??7.????????
??a??????????????????????
??b???????????????????????????????????
??c???????????????????????
??8.??????????
??a??????????????????????????????
??b????????????????????????????????
??c??????????????????????
??d?????????????????
