【单选题】It was feared that his body was _____ a kidney he received in a transplant four years ago.
【单选题】He received four years of training in English and two years in English teaching. He is a _______ English instructor.
【单选题】关于脂肪酸的β-氧化,下列哪一点描述是不正确的( )
【单选题】《素问·上古天真论》认为女子四七则( )