A:Cr2O3
B:CrSO4
C:Cr2(SO4)3
D:Cr2S3
如图,以AB为直径的⊙O与弦CD相交于点E,且AC=2,AE=3,CE=1.则弧BD的长是____
Amy has got lots of friends.(改为一般疑问句并做否定回答)
____Amy ____lots of friends? No, ____ ____.
9+9+9+9+9=5×9.
下列能正确体现农业地域性的例子是( )