Unit 4 Conrvation 王葆真Part II LISTENING AND SPEAKINGLesson A Why Are They Endangered?ListeningSCRIPTTrack 4-1Numbers of most animal species worldwide are going down. For example, in the 1
棉铃虫抗甲氧虫酰肼种群对12种杀虫剂的交互抗性刘娟;董利霞;谭晓伟;范贤林;芮昌辉【摘 要】A methoxyfenozide mid-resistance population (R, 30.57-fold) and a susceptible population (S) of Helicoverpa armigera were ud for evaluating cross resist