A:肤浅(fū)竞相诽谤(fěi)忌恨(jì)繁芜丛杂(wú)
B:诅咒(zhòu)豁然开朗(huò)领域(yù)得心应手(yīng)
C:诬蔑(miè)卓有成效(zhuó)衷心(zhōng)非同寻常(xūn)
D:要素(yào)永垂不朽(xiǔ)
生物变异的主要来源是( )
A. play B. May C. Monday D. second
E. Saturday F. fifth G. March H. walk
I. October J. Friday K. open L. ninth