设m,n∈Z,已知函数f(x)=log2(-x+4)的定义域是m,n,值域是0,2,若函数g(x)=2x-1+m+1有唯一的零点,则m+n=( )
下列有关资源正确的是( )
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Please post this letter in the post office nearby, and __________, I will get two tickets in the train station. ( )