在连续递增的8个奇数中，第七个数字是9，那么这8个数字的总和是多少?
ExcelEnergyCorporation'snewonlinetrainingprogramhas_______(interact)featuresandforumdiscussionsfortrainees.
Thedetailedanalysesofthirdandfourthquartersalesareincludedin___finalreport
设f(x,y)具有一阶偏导数，且对任意的(x,y)，
Thedestructionofthetwintowers_________shockandangerthroughouttheworld．
