A.How humans are to cope with global warming. B.How unstable the West Antarctic ice sheet is. C.How vulnerable the coastal cities are. D.How polar ice impacts global weather.
【简答题】有四种钠的化合物W、X、Y、Z,根据下列反应式判断W、X、Y、Z的化学式。 ① W →X + CO 2 ↑ +H 2 O ② Z + CO 2 → X + 0 2 ③ Z+ H 2 O → Y + 0 2 ↑ ④ X + Ca(OH) 2 → Y + CaCO 3 ↓ W ;X ;Y ;Z 。