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

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

??6??????14???????(?? ??)17????????“?????????”??????????12?????????,??????????????,????????????????????,???????????????????????,???????????,??????????????

  ???????????????

???,??????????planA,???????planB?????????????,???????planB?????????????????,?????,???????????????????,??????,??

??,??????????:?????????????????????????????????

??,??????????,?????????,?????????????

????,????,????????,??????????????????????,??????????????????

????,????????????????“????????”,?????????,????????????,???(?)

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