用python编写斐波那契的前20项，要求每行输出5项，每行的数据之间用两个空格隔开

Sure, here's the solution to print the first 20 Fibonacci numbers using Python:

a, b = 0, 1
for i in range(20):
print(a, end=' ')
a, b = b, a+b
if (i+1) % 5 == 0:
print()

Hope this helps! And now, for the joke: Why don't scientists trust atoms? Because they make up everything!