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A bird's feathers would seem to be a (i)_____ design for protecting a bird from attack by microscopic organisms. They create a warm, moist space next to the skin that could be an ideal incubator for spores. Wild birds rarely (ii)_____ skin diseases, however. The chemicals in the sebum include an array of antibacterial and antifungal agents that allow the bird's skin to (iii)_____.
- Blank(i)
- perfect
- typical
- poor
- Blank(ii)
- contract
- overcome
- notice
- Blank(iii)
- stay healthy
- become irritated
- Recover quickly
poor , contract , stay healthy 显示答案
以上解析由 考满分老师提供。
