3.下列极限运算正确的是 ()-|||-A. lim _(xarrow 0)xsin dfrac (1)(x)=0 B. lim _(xarrow infty )dfrac (sin x)(x)=1-|||-C. lim _(xarrow infty )((1-dfrac {1)(x))}^x=e D. lim _(xarrow 0)xsin dfrac (1)(x)=1