A:finds
B:found
C:find
① {2x=yx+y=2 ;② {2x+y=42x2−y=1 ;③ {2x+y=4z−3=5 ;④ {x=1y=1 .
关于误差的说法中错误的是( )
draw a dragon, go to the zoo, fly a kite, play table tennis, do your homework