单项选择题

The result of the researches so far may help, as asserted by one of the researchers, ______

A．to prevent cardiovascular disease and cancer
B．to understand the processes that lead to cell death
C．to improve our memories
D．to do what we think is right

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热门试题

单项选择题

The rats fed unrestricted diets do NOT ______

A．have one preventing-aging protein increased
B．have their cell death increased or doubled
C．have their DNA fragmentation doubled
D．have the levels of proteins increased

单项选择题

I think that you should take a(n) ______ language course to improve your English.

A．mid
B．middle
C．medium
D．inter, mediate