People were excited when they saw “Monkey King” 2014 the Yellow River Estuary (入海口,河口) International Marathon.
A:losing
B:running
C:refusing
D:forgetting
长江是我国的第一大河。读“长江干流纵剖面示意图”。回答下列问题。
种子植物是植物界中最____的类群,可分为____和____.