a = 9
if a >= 9 :
a = a + 1
a = a * 2
else:
a = a - 1
a = a / 2
a=int(input(“请输入 a=”))
b=
a+=b
print(“a+b=”, )
age=float(input(“请输入年龄=”))
HRrest=float(input(“请输入安静心率=”))
gender=input(“请输入 male 或 female:”)
if gender==“male”:
n=
else:
n=
low=
high=
print(“最适宜的心率是:”,low,“~”,high)