Chemical health recipes

(1) Gas is mixed with air, and it is easy to explode in case of open flame. Closing the valve and opening the window for ventilation can dilute the gas, reduce the temperature and prevent combustion or explosion, so the answer is: closing the valve and opening the window for ventilation;

(2) Recipe: steamed bread, braised beef and fried rape; Steamed bread is rich in sugar, and braised beef is rich in protein, so the answer is: steamed bread, braised beef, fried rapeseed; Steamed bread; Braised beef;

(3) Adding iron to soy sauce can prevent iron deficiency anemia. Baking soda reacts with acid to produce gas, and acetic acid is acidic, so the answer is: iron; Vinegar;

(4) Covering grease can prevent contact with oxygen; Band-aid can treat small wounds, so the answer is: cover with oil, band-aid.