中国大学MOOC: From daylight, our bodies absorb vitamin D through the skin. Certain skin diseases also （2） from exposure to sunlight.
举一反三
- Water of body are from（ ）。 A: the liquids we drink B: evaporation of water from the skin C: the foods we eat D: respiration of water vapor from the lungs E: recycled water in our bodies
- 中国大学MOOC: Features such as height, weight and skin color ______ from person to person.
- In humans, exposure lof the skin to the sunlight is require for _____. A: vatamin-Dsynthesis B: arteriole constriction C: folate production D: thermoregulation
- How does the virus pass from person to person? A: through the air B: skin contact C: through bloodd D: in food
- What kind of cancer may the sunlight protects us from? A: Stomach cancer. B: Skin cancer. C: Lung cancer. D: Blood cancer.