A:铁螺丝连接锌板时,铁不易生锈
B:2NO(g)+2CO(g) ⇌ N2(g)+2CO2(g)向正方向进行时,ΔS<0
C:单斜硫放出热量可转变成正交硫,由此可知正交硫更稳定
D:已知 ,则ΔH1+ΔH2=ΔH3
How long will the woman stay at the hotel?