如图有关下列食物网的叙述,正确的是
A.该食物网有3条食物链
B.鹰与鸟的关系是既捕食又竞争
C.该食物网所处的生态系统为草原生态系统
D.鹰占有两个营养级
答案:C
That boy is easy to .You can become good friends quickly. [ ]
A. get along
B. get along with
C. getting along with
D. getting along
怎样理解实践的本质?