Non-intrusive inspection systerms based on X-ray radiography techriques are rou tinely used at transport hubs to ensure the conforrmity of catgo content with the supplied shipping manifest. As trade volurmes increase and regulatiors become more strin
实现代码一、
#!/usr/bin/python
x,y=9,9
lst=[(x,y,str(y)+'X'+str(x)+'='+str(x*y)) for x in range(1,y+1) for y in range(1,x+1)]
for item in lst:
print item[2],
if(item[0]==item[1]):
print '\n'
实现代码二、
for i in range(1,10):
for j in range(1,i+1):
