What led Professor Olshansky to examine the lives of American presidents?(本题2.5分) A、 People are interested in presidents’ personal appearance. B、 An American president does the hardest job in the world. C、 An American president is good at making important decisions. D、 People generally believe that presidents age faster than other people. √

What led Professor Olshansky to examine the lives of American presidents?(本题2.5分)
A、 People are interested in presidents’ personal appearance.
B、 An American president does the hardest job in the world.
C、 An American president is good at making important decisions.
D、 People generally believe that presidents age faster than other people. √

出自：西安石油大学大学英语I（下）

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