A-A+
Deep-ocean sediments provided better informati
问题详情
Deep-ocean sediments provided better information about the world"s past climate because they ______.
A．are well protected
B．have land-based evidence
C．are in isolation
D．have a longer history
参考答案
正确答案：A
解析：原因目的题。第四段中指出因为它们远离了机械侵蚀及生化活动的影响，这表明海底沉淀物很难受到侵蚀和破坏，从另一个角度也说明了它受到了很好的保护。故选A。
