单项选择题

A．Using computers is a waste of resource.
B．Many people don’’t turn off the computers after using them.
C．Computers are run by electricity.
D．A computer is not a must for working.
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单项选择题
What kind of view is made possible by contiguous cross sections of the body
A．Two-dimensional.
B．Three-dimensional.
C．Animated.
D．Intensified.
单项选择题
A．Quit smoking.B．Loose weight.C．Have a talk with the doctor.D．Weigh himself frequently.
A．Quit smoking.
B．Loose weight.
C．Have a talk with the doctor.
D．Weigh himself frequently.
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