A:食物链是指一定区域内各种生物之间由于食物关系所形成的联系
B:食物网是指不同种类的多条食物链平行连接起来形成的简单结构
C:食物链和食物网是生态系统的营养结构,它与能量流动无关
D:食物链和食物网破坏不会影响生态系统自我调节能力的大小
看图,给下列图片选择合适的句子或对话。
① ____ A. I have a new dress.
② ____ B. Look at my sweater. It's nice.
③ ____ C. My trousers are too long.
④ ____D. Look at his shirt. It's nice.
⑤ ____ E. In winter, I need a warm coat.