A.12V
B.6V
C.0V
[单选题]A.12VB.6VC.0V
[单选题]A.87B.88C.90D.91
[单选题]A.随遇平衡B.不稳定平衡C.稳定平衡D.不确定
[单选题]A.图(a)B.图(b)C.图(c)D.图(d)
[单选题]A.0.59B.1.53C.1.70D.2.12
[单选题]A.0.613B.0.556C.0.459D.0.343
[单选题]A.0.613B.0.556C.0.459D.0.343
[单选题]A.0.59B.1.53C.1.70D.2.12