According to the discussion, what forces belong to action－at－a－distance forces？ [Clink on

According to the discussion, what forces belong to action-at-a-distance forces？ [Clink on 3 answers. ]

A．Gravitational forces.

B．Magnetic forces.

C．Frictional forces.

D．Electric forces.

E．Tensional forces.

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！

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