问题
选择题
假设在一个由草原、鹿和狼组成的相对封闭的自然环境中，把狼杀绝，则鹿的个体数将会[ ]
A．迅速上升
B．缓慢上升
C．保持稳定
D．先上升后下降
答案
答案：D
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假设在一个由草原、鹿和狼组成的相对封闭的自然环境中，把狼杀绝，则鹿的个体数将会[ ]
A．迅速上升
B．缓慢上升
C．保持稳定
D．先上升后下降
答案：D
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