“NaC1+CO2+NH3+H2O=NaHCO3+NH4Cl”是氨碱法制纯碱中的重要反应.下列叙述正确的是( )
广告费用x(万元)
2
3
4
5
销售额y(万元)
26
m
49
54
根据上表可得回归方程 y^ =9x+10.5,则m为( )
-Do you usually _______ the bus to work every day?
-No, _______ I go there by car.