A:teach me English
B:teach my English
C:teaches me English
D:teaches my English
一个物体做匀速直线运动,全程是24m,前一半路程用时4s,后一半路程平均速度为2m/s,求:
①木模的体积;
②铜件的质量.
Does she often____(play) football on Sunday?