x=4
ifx==5:
print("优秀")
elif x==4:
print("良好")
elif x==3:
print("及格")
else:
print("不及格")
a,b=[0]*10,[False]*10
i=0
while i<=9:
if not b[r]:
a[i]=r
i=i+1
print(a)
则划线处的代码依次是( )
① r=random.randint(0,10)
② b[r]=True
③import random
④ b[i]=True
⑤from random import randint
⑥ r=random.randint(0,9)