A-A+

Nautilus's drilling has only been exploratory

2022-08-05 18:41:45 问答库阅读 170 次

问题详情

Nautilus"s drilling has only been exploratory most probably because they are not certain about ______.
A．the richness of the deposits
B．the effectiveness of the ROV
C．how much it lakes to mine the sea
D．how profitable mineral mining is

参考答案

正确答案：B
解析：第3段末句提到了“这种钻探仅仅是探索性的”，至于为什么只处于“探索”阶段，从下一段第3句的问题及其听海登先生的回答可知因为ROV的技术还未完善，因此钻探现在只处于”，探索”的阶段，本题应选B。