徒手肌力检查法分级为()
A.3级
B.4级
C.5级
D.6级
E.7级
参考答案:C
_________at the cafeteria before, Tina didn’t want to eat there again.
A.Having eaten
B.To eat
C.Eat
D.Eating
物体做直线运动,它的位移随时间的变化关系为x=kt,k为常数,则它的速度-时间的图像是[ ]
A.
B.
C.
D.