单项选择题

The aim of voyages Maury encouraged in the 1840s was ______.

A．to make some sound experiments in the oceans
B．to collect samples of sea plants and animals
C．to estimate the length of cable that was to be made
D．to measure the depths of two oceans

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热门试题

单项选择题

It was ______ that asked Maury for help in Oceanographic studies.

A．the American Navy
B．some early intercontinental travelers
C．those who earned a living from the sea
D．the company which proposed to lay an undersea cable

单项选择题

The passage implies that the telegraph cable was built mainly ______.

A．for Oceanographic studies
B．for military purposes
C．for business considerations
D．for investigating the depths of the oceans