单项选择题


Questions 11 - 13 are basic on the following talk. You now have 15 seconds to read Questions 11 - 13.
The next talk of the "Skin Protection Series" will be

A.on skin diseases.
B.on the protection of children’ s skin.
C.on how to relieve the pain of the skin.
D.on the relations between sunlight and Vitamin D needed by our body.