单项选择题

It was ______ that asked Maury for help in oceanographic studies.（）

A．the American Navy
B．some early intercontinental travellers
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 canal was built with the help of （）

A．the airplane
B．the automobile
C．both the plane and the automobile
D．neither the plane nor the automobile