問題詳情
42. The purpose of the second mention of "hormones" in line 4 is to point out
(A) chemical signals that are common among insects
(B) specific responses of various species to chemical signals
(C) similarities between two chemical substances
(D) how insects produce different chemical substances
(A) chemical signals that are common among insects
(B) specific responses of various species to chemical signals
(C) similarities between two chemical substances
(D) how insects produce different chemical substances
參考答案
答案：C
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)
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