环境中影响生物形态、生理、分布的因素称为____.它又分为____和____.
He came in with ____ (noise) footsteps(脚步) to surprise her.
Would you please tell me________to deal with all the problems, Mr Feng?
下列三个数:a=ln32﹣32,b=lnπ﹣π,c=ln3﹣3,大小顺序正确的是( )