营养结构。
参考答案:
指生态系统中生物间构成的食物链和食物网结构。
两千多年前,我国森林覆盖率达50%,而现在仅为16.55%.这种变化导致的结果是( )
A.野生动物有了更大的生活空间
B.少量的以植物为食的野生动物数量减少
C.对动物的影响不大
D.大量的野生动物因栖息地丧失或食物减少而灭绝或濒临灭绝
Which nursing diagnosis would be the most appropriate for a client with coronary artery disease (CAD)
A.Ineffective thermoregulation.
B.Impaired gas exchange.
C.Risk for injury.
D.Decreased cardiac output.