A.0
B.-1
C.1
D.2
[单选题]定积分等于( )。A.0B.-1C.1D.2
[单选题]定积分等于( )。A.0B.-1C.1D.2
[单选题]定积分等于( )。A.0B.-1C.1D.2
[单选题]定积分等于( )。A.0B.-1C.1D.2
[单选题]定积分等于( )。A.0B.-1C.1D.2
[单选题]定积分等于( )。A.0B.-1C.1D.2
[单选题]定积分等于( )。A.0B.-1C.1D.2
[单选题]定积分等于( )。A.0B.-1C.1D.2
[单选题]定积分等于( )。A.0B.-1C.1D.2
[单选题]定积分等于( )。A.0B.-1C.1D.2