Enter the laboratory without teacher’s permission(批准)

• Do

• Don't

Leave a lighted Bunsen burnerunattended(置之不理).

• Do

• Don't

Report all accidents(意外) to the teacher at once.

• Do

• Don't

Tie back long hair and fasten school ties when doing experiments(實驗).

• Do

• Don't

Wash the affected area with plenty of water if a chemical(化學品) gets onto the skin.

• Do

• Don't

Wear safety goggles (安全眼鏡) when heating or mixing substances.

• Do

• Don't

Plug (插) the electric sockets (電掣) with wet hands.

• Do

• Don't

Pick up(拾起)broken glasses(玻璃碎片) with bare hands(徒手).

• Do

• Don't

Do experiments without teacher’s permission.

• Do

• Don't

Smell(鼻嗅) or taste(口嚐) any chemicalsunless the teacher allows us to do so.

• Do

• Don't