— .
A:It's on the dresser
B:They're on the dresser
C:On the dresser
D:B and C
小华同学骑着一辆变速自行车上学,在平直公路上匀速运动300m,所用时间为1min.假设自行车在行驶过程中受到的阻力为18N.请你解答: