题目

Starting the day on an egg could keep your blood pressure (血压) under control, research suggests. Scientists have shown that eggs produce proteins with a function similar to that of powerful blood pressure­lowering drugs. The research, from the University of Alberta in Canada, showed that when eggs come in contact with stomach enzymes (酶) they produce a protein that acts in the same way as ACE inhibitors used to treat heart disease, but more work is needed to show the effects outside a lab and in the human body. Earlier this month, British researchers declared that, opposite to p若，，则的值是　　A. B. C. 1 D. 25