問題詳情
16. Even at low levels, ______A) the nervous system has produced detrimental effects by lead.B) lead’s detrimental effects are producing the nervous system.C) lead produces detrimental effects on the nervous system.D) the detrimental effects produced by lead on the nervous system.
參考答案
答案：C
難度：適中0.5
統計：A(14),B(3),C(29),D(10),E(0)
用户評論
【用戶】羅逸昇
【年級】大一上
【評論內容】lead 這裡指的是鉛