16.下列各式中,是分式的是( )
0 282956 282964 282970 282974 282980 282982 282986 282992 282994 283000 283006 283010 283012 283016 283022 283024 283030 283034 283036 283040 283042 283046 283048 283050 283051 283052 283054 283055 283056 283058 283060 283064 283066 283070 283072 283076 283082 283084 283090 283094 283096 283100 283106 283112 283114 283120 283124 283126 283132 283136 283142 283150 366461
| A. | $\frac{{x}^{2}+1}{2}$ | B. | $\frac{3xy}{π}$ | C. | $\frac{3}{xy}$ | D. | $\frac{m-n}{5}$ |