——You look pretty in green, Kate. ——Thank you. I like green. Green ______give me energy.
A:can
B:must
C:should
D:has to
2.1×0.3=
0.5×0.8=
3÷0.5=
2.1÷0.3=
0.37÷0.1=
0.25×4=
3.6÷6=
4×0.23=
3÷2=
0.64÷0.8=
小红面向西南方,她后面是____方。
底面半径R,高为h的圆柱与底面半径为r,高为h的圆柱的体积的比是9:25,则R:r等于( )
2876+7231=____
90000-198=____