2. 外语
  3. Certain animal behaviors, such as mating rituals, seem to be______, and therefore______external factors such as climate changes,

Certain animal behaviors, such as mating rituals, seem to be______, and therefore______external factors such as climate changes,

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问题 Certain animal behaviors, such as mating rituals, seem to be______, and therefore______external factors such as climate changes, food supply, or the presence of other animals of the same species.
选项 A、learned, immune to
B、innate, unaffected by
C、intricate, belong to
D、specific, confused with
答案B
解析 在给出的选项中：learned“学到的”，immune to“不受……感染”；innate“先天的”，unaffected by“不受……影响”；intricate“复杂的”，belong to“属于”；spe—cific“特定的”，confused with“混淆”。根据句意和各个选项的意思可知，正确答案是B。
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