考博考试

【单选题】It is supposed that about half of the varieties of fish living in the dark depths have ______.
A．evolved more than one means of creating light
B．some power of illumination
C．developed extremely sensitive feelers
D．almost telescopic eyes
网考网参考答案：B
网考网解析：
末段指出约一半以上生活在海底深处的鱼have some power of illumination，可得出答案为B项。 查看试题解析出处>>