第19章 交易

--------------1-2--------------------------------------------------------------……-----------------------------------------

------------------------------------------------------------------------------------------------------……

-----------------------------------……----------

------------------------------------------“----------------------------------------------……”

“-----”-----------“-------------------------”

-----------------------------------------------------------------------------------------------“---------1----------------------……----------------”

“--”-------------

“---------------------”

--------------------------------------------------------------------

-------------------“---------------------------------------------------……--------------------------------------------------------……------------------------------------------------------------------------------”

“-----------”------------------“-----------------”

--------

--------

“-……------2----+10---10---5-------”

-5---------------------------116------------------------------------

----------------------------------------

“-……-----------------”

“-……----------------……”

----------------------------------------------------------------------------------------

--------------------------------ì