Pumped-storage station e petri dish: o que têm em comum

1. Passo 1. Pumped-storage station — é feito de — Concreto. The reservoirs and dam are concrete.
2. Passo 2. Concreto — é material para — Sewage treatment plant. The tanks are concrete.
3. Passo 3. Sewage treatment plant — utiliza — Culture medium (agar). Waste water is cleaned by activated sludge — bacteria.
4. Passo 4. Culture medium (agar) — utiliza — Petri dish. Agar in dishes.

Abrir Evothings