A:0,3
B:﹣1,3
C:1,3
D:﹣1,2
如图所示,他把圆周率的数值计算到小数点以后第七位,他是( )
①3x2+x=20;②2x2﹣3xy+4=0;③ x2−1x=4 ;④x2=1;⑤ x2−x3+3=0
A:How many horses do you have?
B:Four.