单项选择题

This passage is mainly about______.

A．the beginnings of oceanography
B．the laying of the first undersea cable
C．the investigation of ocean depths
D．the early intercontinental communications

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热门试题

单项选择题

According to the author, the introduction of the computer is a revolution mainly because______.

A．the computer has revolutionized the workings of the human mind
B．the computer can do the tasks that could only be done by people before
C．it has helped to switch to an information technology
D．it has a great potential impact on society

单项选择题

A spear or a robot has the quality of technology only when it______.

A．is used both as a cultural and a physical object
B．serves different purposes equally well
C．is utilized by man
D．can be of use to both man and animal