已知代数式2x+3y=1，请你用x的代数式表示y为______．
2x+3y=1，
解得：y=1-2x3．
故答案为：y=1-2x3
It has been sunny these days, so I ______ it ______ tomorrow.
A．think , won’t rain
B．don’t think, will rain
C．think ,doesn’t rain
D．don’t think , rains
A．mgtgθ
B．mgsinθ
C．μmg
D．μmg
mgtgθ
mgsinθ