?????????????? ??2?????6??????18?????:

??,?,2?6??????????20??8???20??,????????6~8?,??????,???????????10????;????????????????????4~6?,??7~8?,?10????????????????8?,????0??????????????????????,????????6~8??

qxtx

qxtx

??????????????:

1?????????;

2?????????????;

3????????;

4????????

??:????????? ??“?????????????”

?? ??:??????10??????????????

????:1??????????????:????100????

2?????

3?????????

4???????????

5????????????

?????????????? ??2?????6??????18?????:

??,?,2?6??????????20??8???20??,????????6~8?,??????,???????????10????;????????????????????4~6?,??7~8?,?10????????????????8?,????0??????????????????????,????????6~8??

qxtx

qxtx

??????????????:

1?????????;

2?????????????;

3????????;

4????????

??:?????????