Suspension bridge e congelador: o que têm em comum

1. Passo 1. Suspension bridge — é feito de — Stone. The towers are stone.
2. Passo 2. Stone — é material para — Ice house. Ice houses were built of stone and sunk into the ground.
3. Passo 3. Ice house — evoluiu para — Refrigerator. The refrigerator replaced natural ice.
4. Passo 4. Refrigerator — inclui — Congelador. A refrigeration appliance.

Abrir Evothings