A：N2H4(g)＋O2(g)====N2(g)＋H2O(g)；ΔH=＋267 kJ·mol－1
B：N2H4(g)＋O2(g)====N2(g)＋2H2O(g)；ΔH =－534 kJ·mol－1
C：N2H4(g)＋O2(g)====N2(g)＋2H2O(g)；ΔH =＋534 kJ·mol－1
D：N2H4(g)＋O2(g)====N2(g)＋2H2O(l)；ΔH =－133.5 kJ·mol－1
Mr. Black is always patient _____ us students and guides us ______ a lot better in math.
翠鸟喜欢停在水边的苇秆上，一双红色的小爪子紧紧地抓住苇秆。它的颜色非常鲜艳。头上的羽毛像橄榄色的头巾，绣满了翠绿色的花纹。背上的羽毛像浅绿色的外衣。腹部的羽毛像赤褐色的衬衫。它小巧玲珑，一双透亮灵活的眼睛下面，长着一张又尖又长的嘴。
