— She is a writer. She is famous ____(as/ for) children's works.
已知a,b是实数,则“a+b=a+b”是“ab>0”的( )
细菌对青霉素的抗药性越来越强,对此现象解释无关的是( )
下列关于青春期心理矛盾的叙述中,错误的是( )