When did people become uneasy and concerned about Cliff Young?
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According to Cliff Young himself, what made him run throughout the race?
What did Cliff Young do with his first prize?
What example does Cliff Young set for us according to the author?
肌内注射应选择的部位是( )。
A. 臀大肌
B. 臀中、小肌
C. 三角肌
D. 股外侧肌
E. 三角肌下缘
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