2. 外语
  3. Penguins do not suffer from the cold in Antarctica because their feathers secrete protective oil.

Penguins do not suffer from the cold in Antarctica because their feathers secrete protective oil.

admin2012-07-30  65
问题 Penguins do not suffer from the cold in Antarctica because their feathers secrete protective oil.
选项 A、hide
B、warm
C、produce
D、absorb
答案C
解析 分泌
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