单项选择题

What is the author's attitude toward this new technique

A．Cautious
B．Tolerant.
C．Enthusiastic
D．Critical
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单项选择题
Conventional X-rays mainly show the difference between _________.
A．bone and air
B．liver and pancreas
C．muscle and other body
D．heart and lungs
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.
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