問題詳情

35.Many animals use odors for identification, __________, sexual attraction, alarm, and a variety of other purposes.
(A) The territorial marking
(B) they mark territory
(C) territorial marking
(D) mark territory

參考答案

答案:C
難度:簡單0.884793
統計:A(6),B(19),C(384),D(25),E(0)

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