运动强度接近50%VO2max时才可增强心肺适应能力,故常把这一强度称为锻炼阈。
参考答案:对
Westley Moore was a _______ American boy.[ ]
A. 15-years-old
B. 15-year-old
C. 15 years old
D. 15 year old's
简述结、直肠癌的病因、病理、转移途径、临床表现、相关检查、鉴别诊断要点及治疗原则