A:frog
B:rabbit
C:bee
—______. I have to make a plan for Clean-Up Day.
已知函数f(x)=x2,g(x)=lgx,若有f(a)=g(b),则b的取值范围是( )
长江中上游防护林所起的生态作用是( )
如图中阴影区域所示工业基地是( )