2. 外语
  3. How long an animal or plant can live is governed by heredity, environment, and chance.

How long an animal or plant can live is governed by heredity, environment, and chance.

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问题 How long an animal or plant can live is governed by heredity, environment, and chance.
选项 A、history
B、genetics
C、climate
D、altitude
答案B
解析 B项genetics“遗传”，与划线词最相近。A项history和genetics、heredity多少有关；C项climate和D项altitude有一定的干扰性，因为似乎可以放入空中而与environment并列，但显然不合题意。
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