A:f(5)<f(2)<f(-1)
B:f(5)<f(-1)<f(2)
C:f(-1)<f(2)<f(5)
D:f(2)<f(-1)<f(5)
下列式子中,不属于二次根式的是( )
Many people are building the factory in the city because it' not good for the environment.
给你。可以说: