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.

<上一题目录下一题>

热门试题

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.

单项选择题

The expression hew very closely to can be best replaced by

A．"shed light on".
B．"adhere strictly to".
C．"stay away from".
D．"give play to".