?? ???“X”??????? ?????????
????:1???????????:????????
2??????v
3??????
4????????????
5?????
2??5????????????(??),?????????????????,?“?X”????????????,?,??????????????????????????,?? “X” ????????????,????“????????X” ???????????????????,?1?,???????,?6??,?2??????????????5???4??5??6????3??8????1????9??29???????11?27????(??10?????????????)??(???? ???? ???? ?)
?????:?????