【单选题】Anger, worry, disappointment, these negative emotions ______ your heart, brain and body.
【单选题】能量沿着食物网流动时,保留在生态系统内各营养级中的能量变化趋势是:
【单选题】能量沿着食物网流动时,保留在生态系统内各营养级中能量变化趋势是( )
D.
因生态系统不同,能量或越来越少,或越来越多。
【单选题】Anger, worry, disappointment, these negative emotions ________ your heart, brain and body.
【单选题】Negative feelings such as anger, worry and depression are ___ to the mind.
【单选题】能量沿着食物网流动时,保留在生态系统内各营养级中的能量变化趋势是( )