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printf problem!!!!

tyw zqq

I have a question as follow:

in my project,there is a state:

printf("\nplease\n");

and its disassembly is :

140:         printf("\nplease\n");
141:
0x300004E4  E28F0040  ADD       R0,PC,#0x00000040
0x300004E8  FA000013  (???)


I want to know this is why?