Gallium arsenide e stone tool: o que têm em comum

1. Passo 1. Gallium arsenide — é material para — LED. The first LEDs were gallium arsenide phosphide.
2. Passo 2. LED — faz parte de — Outdoor. LED screens.
3. Passo 3. Outdoor — é feito de — Paper. The poster is paper.
4. Passo 4. Paper — é material para — Lança de fogo. The barrel of a fire lance is a paper or bamboo tube.
5. Passo 5. Lança de fogo — evoluiu de — Spear. The fire lance was a spear with a tube of gunpowder — the first step to firearms.
6. Passo 6. Spear — tem como parte — Stone tool. Early spearheads were made of stone.

Abrir Evothings