2. 考研
  3. The author refers to the ocean bottom as a "frontier" in the first sentence because it______. Which of the following is tree of

The author refers to the ocean bottom as a "frontier" in the first sentence because it______. Which of the following is tree of

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问题 The author refers to the ocean bottom as a "frontier" in the first sentence because it______.
Which of the following is tree of the Glomar Challenger?
选项 A、It is a type of submarine.
B、It is an ongoing project.
C、It has gone on over 100 voyages.
D、It made its first DSDP voyage in 1968.
答案D
解析 第二段提到，虽然研究者在过去的100多年里已经获得了一些深海岩石和沉淀物，但是第一次对海底进行详细的研究到了1968年才真正开始。使用首先为沿海油气公司开发的技术，DSDP的钻探船the Glornar Challenger漂浮在海面上，深深地钻入海底，从海底取出了沉淀物和岩石采样。第三段第一句也提到，截止到1983年，Glomar Challenger在15年的研究项目中完成了96次航行。1983年减去15年也，也恰好是1968年。
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