单项选择题

The DNA designed by Evan's technology differs strikingly from that synthesized by existing technology in that the former is characterized by its

A．desirable shape and length.
B．imitation of a living cell.
C．delicate but destructive power.
D．resistance to epidemics.
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单项选择题
This passage is mainly
A．about a new application of computers.
B．a review of a science-fiction movie.
C．about the synthesizing interesting DNA.
D．a survey of scientific breakthroughs.
单项选择题
It can be inferred from the text that the synthesizing DNA technology should be used
A．extravagantly and freely.
B．flexibly and excessively.
C．reasonably and cautiously.
D．openly and vigorously.
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