2. 职称英语
  3. Passage One [br] Why hasn’t the fur-seal population increased?Because of overfis

Passage One [br] Why hasn’t the fur-seal population increased?Because of overfis

游客2023-10-23  63
问题 Passage One [br] Why hasn’t the fur-seal population increased?
选项
答案 Because of overfishing and an ailing ecosystem．
解析 第4段以海狗、海狮和海鸟的数量说明本段第2句提到的“从食物链上较高的层次可以看到过渡捕捞和病态的生态环境的迹象”，这就表明，过度捕捞和病态的生态环境是导致海狗数量上不去的原因。
转载请注明原文地址:https://tihaiku.com/zcyy/3121679.html
相关试题推荐
随机试题
最新回复(0)