A:
B:
C:
D:
如图,从甲图转变为乙图的第一步操作是( )
如果△ABC∽△DEF,且对应高之比为2:3,那么△ABC和△DEF的面积之比是____.
— What vegetables do you like?
— I like .
480÷16=____ 120×30=____ 540÷60=____ 770÷70=____
0÷45×2=____ 51÷3=____ 25×40=____ 17×6÷17×6=____