1 Having high or low cholesterol does not exclude a person from donating blood. 2  Potential blood donors may be temporarily prevented from donating if they have a low level of iron (hematocrit) in their blood.
Headline Clickable. To keep food warm without overcooking, set your oven to the lowest temperature (which is probably 200 degrees F) and cover the food with foil.eadline Clickable. To keep food warm without overcooking, set your oven to the lowest temperature (which is probably 200 degrees F) and cover the food with foil.
Once your oven is preheated to that temperature, there should be an indicator / light that blinks (or even a sound) that lets you know that the oven is at the temperature. In your directions above, it says you have been told to preheat the oven to 180 c for 10 minutes.