单项选择题

What do we learn from the last paragraph

A．Biotechnology can solve all our future energy problems.
B．Biological power is cheaper than nuclear power.
C．Biological power may not be as dangerous as nuclear power,
D．Biological power will keep all its promises.

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热门试题

单项选择题

According to the passage, it may soon be possible

A．to make something as good as human skin.
B．to produce drugs without side effects.
C．to transplant human organs.
D．to make artificial hearts and eyes.

单项选择题

Organic chemistry helps to produce materials that are

A．as good as wool.
B．as good as an insect's body.
C．not as good as natural materials.
D．better than natural materials.