Come to Jiangning before the weather is fine.

(1) There are two kinds of charges in nature: positive charge and negative charge;

(2) The plastic wire rubs the hand to generate electricity. The hand carries one charge and the filament carries another charge. Because plastic filaments have the same charges, the same charges repel each other, which leads to the diffusion of filaments.

So, the answer is: positive and negative; After rubbing, the filaments have the same charge, and the same charges repel each other.