A:living
B:alive
C:live
D:lives
FeSO4+Na2CO3= FeCO3↓+Na2SO4
FeCO3+ 2CH3CHOHCOOH =(CH3CHOHCOO)2Fe+CO2↑+H2O
如图所示电路,开关K断开和闭合时电流表示数的之比是1:3,则可知电阻R1和R2之比:( )
Shu-How Lin is now one of_______ basketball players in the NBA.