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  3. What does the passage mainly discuss? [br] The purpose of the second mention o

What does the passage mainly discuss? [br] The purpose of the second mention o

游客2025-02-09  32
问题  What does the passage mainly discuss? [br]  The purpose of the second mention of "hormones" in line 4 is to point out
选项 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
答案 C
解析
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