A) the beginnings of oceanography
B) the laying of the first undersea cable
C) the investigation of ocean depths
D) the early intercontinental communications
Questions 21 to 25 are based on the following passage:
Oceanography has been defined asThe application of all sciences to the study of the sea.
注:1.Oceanography 由 Ocean 和 graphy 组成,意为 海洋学
2.application 表示 申请 用介词for,表示 应用 用介词to
3.第一句给某个东西下定义,称为篇章定义,必为文章主题
Before the nineteenth century, scientists with an interest in the sea were few and far between. Certainly Newton considered some theoretical aspects of it in his writings, but he was reluctant to go to sea to further his work.
注:1.第二段:在十九世纪之前,对海洋感兴趣的科学家很少,可以推断本文根据时间顺序来描述海洋学发展的过程
2.further 跟在 to 后面是个动词,表示 推进
For most people the sea was remote, and with the exception of early intercontinental travelers or others who earned a living from the sea, there was little reason to ask many questions about it, let alone to ask what lay beneath the surface. The first time that the questionWhat is at the bottom of the oceans?had to be answered with any commercial consequence was when the laying of a telegraph cable from Europe to America was proposed. The engineers had to know the depth profile of the route to estimate the length of cable that had to be manufactured.
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