单项选择题

According to Dr. Sacco, ______.

A．different wines work differently on drinkers at stroke risk
B．non-drinkers should also consume a moderate amount of alcohol
C．drinkers should keep to one kind of alcohol to ward off strokes
D．moderate alcohol consumption protects against strokes

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单项选择题

From the fourth paragraph we learn that ______.

A．heart attacks are more likely caused by alcohol than stroke
B．moderate drinking discourage blood platelets from clotting
C．boosting the levels of good cholesterol can lead to heart attacks
D．moderate drinking protect people by making the blood cell clump

单项选择题

We can learn from the first paragraph that ______.

A．federal funds have been used in a project to clone humans
B．the White House responded strongly to the news of cloning
C．NBAC was authorized to control the misuse of cloning technique
D．the White House has got the panel’s recommendations on cloning