A:S+O2↑ →点燃 SO2
B:2H2+O2 →点燃 2H2O
C:6Fe+4O2 →点燃 2Fe3O4
D:Mg+O2 →点燃 MgO2
下列加线字的注音有误的一项是( )
There is a common saying in China________nothing in the world is difficult for one who sets his mind on it.
观察漫画。回答小题
对半坡聚落和河姆渡聚落的共同之处表述不正确的是( )