单项选择题

The writer’s main purpose in writing the passage is to say that _________.

A．science is just at its beginning
B．science has greatly improved man’s life
C．science has made profound progress
D．science has done too little to human beings

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热门试题

单项选择题

Now scientists have found in the past few years _________.

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

单项选择题

What conclusion can be drawn from the passage

A．Professional killers should not be treated with humane treatment.
B．The violent robbers should think twice before pulling the trigger.
C．We should give the poisoner time to ponder about while he is shaking up or serving his arsenic cocktail.
D．Severe punishment, even death penalty, should be given to criminals.