单项选择题

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单项选择题
What is discovered by scientists at Brown University
A. The inhibitor of the HIV transmission.
B. An effective way to deliver AIDS drugs.
C. A good strategy to prevent HIV transmission.
D. Bacteria from yogurt may help fight HIV.
单项选择题
The news item mainly about
A. meat canning, a tradition in American church groups.
B. American church groups’ canning food for those in need.
C. how to can food in American church groups.
D. the canned food delivery all over the world.
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