图1-16是用火柴摆成的猪,想想看,如何移动2根火柴,使它变成四腿张开的猪?
图1-16 i/ON82Ow75uVM6pYRFe1Ck1KZgqEYe6EwD4GPmRkLMOiAeNEOEOy0S2gKpTsT1Di