解:(1)设:f(x)=ax+b,a≠0,因为f(f(x))=4x﹣1,
即:a(ax+b)+b=4x﹣1,
a2=4a<
保护生物多样性最为有效的措施是 ( )
— Can you talk with me _________ the phone?
— Yes, but not now.
正常人的尿液与血液共有的成分有( )