A:That…that you had expected
B:What …that you had expected
C:That…what you had expected
D:What…what you had expected
四个质点作直线运动,它们的速度时间图象分别如下图所示,下列说法中正确的是( )
若函数f(x)=x2+1x≤1lgxx>1,则f(f(10))=( )