A.-4
B.0
C.1
D.4
[单选题]A.-4B.0C.1D.4
[单选题]A.-4B.0C.1D.4
[单选题]A.-4B.0C.1D.4
[单选题]A.-4B.0C.1D.4
[单选题]A.-4B.0C.1D.4
[单选题]A.-4B.0C.1D.4
[单选题]A.-4B.0C.1D.4
[单选题]A.-4B.0C.1D.4
[单选题]A.-4B.0C.1D.4
[单选题]A.一个极小值点和两个极大值点B.两个极小值点和一个极大值点C.两个极小值点和两个极大值点D.三个极小值点和一个极大值点