She be here.I saw her come in.
A:can
B:may
C:should
D:must
线段AB两端点坐标分别为A(﹣1,4),B(4,﹣2),现将线段AB平移后点A的对应点坐标为(﹣4,2),则点B的对应点的坐标为( )
C(s)+H2O(l)=CO(g)+H2(g);△H1=+175.3kJ•mol﹣1
2CO(g)+O2(g)=CO2(g);△H2=﹣566.0kJ•mol﹣1
2H2(g)+O2(g)=2H2O(l);△H3=﹣571.6kJ•mol﹣1.