fix：修改投资表等级

cehua_wcy

2018-08-28 aed5a00d235f5a1f529bd27c6d1e263ed8c3d419

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#lostTick Íæ¼Ò±¾´Î´ðÌâËùÓõÄʱ¼ä ºÁÃë 
( 
   int(max(8,min(24,8+4*(5000 - lostTick)/1000))) 
   
)