A:offers; leave
B:provides; make
C:supplies; give
D:gives; have
— That's for sure. Trust me!
下列关于细菌和真菌的说法正确的是( )
偶函数fx在0,+∞)上为减函数,不等式fax-1>f2+x2恒成立,则a的取值范围是( )