1,设括号里的数为x,则x+x=A,x-x=0=B,x/x=1=C 所以A+B+C=2*x+0+1=
108 可得x=53.5
2,country 乡村
3,track痕迹
4,When do you often plant trees?
What does the doctor have to do?
1,设括号里的数为x,则x+x=A,x-x=0=B,x/x=1=C 所以A+B+C=2*x+0+1=
108 可得x=53.5
2,country 乡村
3,track痕迹
4,When do you often plant trees?
What does the doctor have to do?