At present, China is still on the ____(初级的) stage of socialism.
函数f(x)的图象如图所示,下列数值排序正确的是 ( )
已知:①S(单斜,s)+O2(g)═SO2(g)△H1=﹣297.16kJ•mol﹣1
②S(正交,s)+O2(g)═SO2(g)△H2=﹣296.83kJ•mol﹣1
③S(单斜,s)═S(正交,s)△H3
下列说法正确的是( )
下列有关生态学规律的叙述不正确的是( )