单项选择题

What was hailed as a biological revolution thirty years ago

A．Discovery of the structure of DNA
B．The decoding of the linear language
C．The mechanical device found in the human cell
D．The unbelievable complexity of DNA

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热门试题

单项选择题

The passage suggests that learning to speak and learning to fide a bicycle ______.

A．provide essential skills for learning to grow
B．need a lot of teaching and correction
C．are similar in that they are learnt by practicing and making changes
D．are quite different in the way they are picked up naturally

单项选择题

Scientists have discovered in the past few years that ______.

A．the exposure of DNA to the public is unnecessary
B．the tiny cell in DNA is a neat little machine
C．man actually knows nothing about DNA
D．man has much to learn about DNA