设x。是方程1n x+x=4 的解，则x。属于区间

令f(x)=lnx+x-4
f(1)=0+1-4<0
f(2)=ln2-2<0
f(3)=ln3-1,3>e,ln3>1,所以f(3)>0
所以在2和3之间
选C

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