—How long ________they_________?—Sorry, I don't know. But I know that Mr. Chen is going to _______a nurse next month.
A:did, get marry; marry with
B:have; got married; marry
C:have; been married; marry
①2FeTiO3+6C+7Cl2 高温__ 2X+2TiCl4+6CO,②TiCl4+2Mg =Ar800°C Ti + 2MgCl2
则X为( )
如图所示,向盛有红棕色NO2的气体的容器A投入几块木炭,容器A中的现象为____,右边漏斗中的液面____。