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

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热门试题

单项选择题

One of the effects of directed research is to______.

A．give rise to feelings of hostility among scientists of different branches
B．involve an increasing number of scientists in a lot of extra work
C．get scientists directly involved in research projects with immediate industrial applications
D．yield fewer results with a greater amount of manpower and materials

单项选择题

What is directed research

A．Theory research.
B．Casual research.
C．Technical research.
D．Designed research.