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

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热门试题

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

单项选择题

The word defied in the fifth paragraph probably means ______.

A．doubted
B．gave proof to
C．challenged
D．agreed to