Questions 11～13 are based on the following monologue. By which is the average adult covered
A: Three feet of skin.
B: Twelve yards of skin.
C: Two square feet of skin.
D: Two square yards of skin.
A: Three feet of skin.
B: Twelve yards of skin.
C: Two square feet of skin.
D: Two square yards of skin.
举一反三
- ________To do a skin test, a doctor puts venom under the skin.
- Choose the correct answers according to the pictures.[img=428x520]18031ea2d6f09e0.jpg[/img] A: He has freckled skin and a round face. B: He has winkled face and tanned color skin. C: He has rosy cheek and silky skin. D: He has dry skin and fair complexion.
- The basal layer of the outermost layer of the skin contains special cells called_________(注意写复数形式). The black pigment can give color to the skin.
- 中国大学MOOC: From daylight, our bodies absorb vitamin D through the skin. Certain skin diseases also （2） from exposure to sunlight.
- Acoustic ultrasound gel is applied to the skin to A: a) Allow good transmission of sound waves into the body. B: b) Lubricate the skin. C: c) Increase the amount of ultrasound scatter.