A:0
B:1
C:2
D:不确定
Do you have a baseball bat?
Yes,____ ____ .
Does Ann have a baseball?
No, ____ ____ .
Do Jack and Jim have computers?
Yes, ____ ____ .
Does Chi Yong have a soccer ball?
No,____ ____ .
Do you have a tennis racket?
No,____ ____ .
已知 , ,则tanα=____.