100以内的孪生素数对有8对。分别为: [3,5] [5,7] [11,13] [17,19] [29,31] [41,43] [59,61] [71,73] |
def judgss(n):#证明n是否为素数
i=2
while i<=int(math.sqrt(n)):
if n % i==0:
return False
i+=1
return ①
ssd=[]
k=2
while k<100:
if judgss(k)==True and②
ssd.append(__▲____)# append()为列表添加元素
k+=2
else:③
print(“100以内的孪生素数对有”,len(ssd),“对。分别为:”)
for i in range(len(ssd)):
print(ssd[i])
(1)数据对:21和23
(2)完善①②③划线处的代码。
(3)程序段中▲处,填入的代码是
A.k,k+2 B.[k,k+2] C.[k],[k+2]
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2