专四
A．The inhibitor of the HIV transrmssion.
B．An effective way to deliver AIDS drugs.
C．A good strategy to prevent HIV transmission.
D．Bacteria from yogurt may help fight HIV.
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A．It is an active ingredient in a foam, cream or suppository.
B．It is an active ingredient applied before sex to prevent HIV transmission.
C．It is a protein that protects the body from infection by microorganisms.
D．It is a drug used to prevent HIV transmission.
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.
A．5 hours.
B．10 hours.
C．17 hours.
D．20 hours.
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根据以下资料，回答题：
Dried foods
Nowadays vegetables are most commonly dried
Alkaline solutions are used to