A:What; how
B:That; that
C:What; what
D:How; what
跑步时,( )关节参与了运动。(多选题)
钩码重G/N
0.5
1
1.5
2
2.5
3
3.5
弹簧伸长量x/cm
4
6
8
10
12
14
弹力F/N