单选题
Most of the marine species living in the darkest depths have ______.
A、
learned to live without light
B、
evolved ingenious devices to help them
C、
found ways to supply their own light
D、
developed extremely sensitive eyes
【正确答案】
B
【答案解析】
第一段提到大多数海底深处的生物have evolved some extremely ingenious devices来寻找食物和发现敌人。
提交答案
关闭