A:2+ 2
B:1+22
C:2+22
D:1+ 2
补写出下列句子的空缺部分。
甲、乙、丙三个质量相同的物体均受到大小相等的恒力F,方向如图所示。三个物体均静止在水平地面上,且地面与物体间的动摩擦因数均相同,则 ( )
— Oh, my god! My wallet is gone.
一 Where did you put it? Maybe you just left it somewhere.