試卷：無年度 - 2000年1月托福閱讀#20905
| 科目：TOEFL(Test of English as a Foreign Language)托福
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試卷名稱：無年度 - 2000年1月托福閱讀#20905
科目：TOEFL(Test of English as a Foreign Language)托福
20. According to paragraph 3, a deep foundation of nesting material provides
(A) a constant source of humidity
(B) a strong nest box
(C) more room for newly hatched chicks
(D) protection against cold weather
阿摩線上測驗
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