A:肄业(yì)拊心(fǔ)峥嵘(lóng)蓊蓊郁郁(wěng)
B:伶俜(pīng)樊(fán)笼百舸争流(kě)冯虚御风(píng)
C:邮戳(chuō)瑰怪(guī)横槊赋诗(shuò)夜缒而出(chuí)
D:守拙(zhuō)袅娜(nuó)流觞曲水(qū)渐车帷裳(cháng)
____ ____ ____ = ____ (只)
下列式子:x2﹣1,1a+2,3a2b7,abc,﹣5x,3中,整式的个数有( )