for l in L: print('Hello,', l, '!')
print('第一种叹号前有一个空格')
for l in L: print('Hello, %s!' % l)
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liangd123654
for l in L: print('Hello,', l, '!')
print('第一种叹号前有一个空格')
for l in L: print('Hello, %s!' % l)