单项选择题

A.(a)H2O(l,373K,100kPa)与(b)H2O(g,373K,100kPa)
B.(a)H2O(l,373K,200kPa)与(b)H2O(g,373K,200kPa)
C.(a)H2O(l,374K,100kPa)与(b)H2O(g,374K,100kPa)
D.(a)H2O(l,373K,100kPa)与(b)H2O(g,373K,200kPa)