单项选择题

The researchers found that______.

A．the gene therapy could be verified by animal experiments
B．the antitat gene may be artificially produced
C．antitat protein functions without causing any side-effects
D．antitat gene enhances the human immune system

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热门试题

单项选择题

What does the phrase to bust the trusts mean here

A．To break business monopolies.
B．To arrest law breakers.
C．To dismiss unnecessary workers.
D．To model government management.

单项选择题

Which of the following was not included as a purpose of social reform movements

A．Regulation of working conditions.
B．Prohibition of alcoholic beverages.
C．Large immigrations to the US.
D．Improvement of living conditions.