A-A+
What can we learn from the 19 metres deep depo
问题详情
What can we learn from the 19 metres deep deposits found by Nautilus compared with man ganese mines？
A．They are much thicker.
B．They lie more deeply in the sea.
C．They are of smaller scale.
D．They lie more densely together.
参考答案
正确答案：D
解析：第5段末句开头的such concentrated deposits指的就是鹦鹉螺公司发现的19米深矿藏，其中concentrated表明这个矿藏密度高，而通过上一句中提到的这个矿藏不像锰矿那样“散布”在海床，进一步确定了鹦鹉螺公司发现的矿藏分布得比较集，因此本题应选D。
