A.安全 B.有效 C.簡(jiǎn)便 D.經(jīng)濟(jì)
A.經(jīng)濟(jì)觀點(diǎn) B.綜合協(xié)觀點(diǎn) C.安全觀點(diǎn) D.生態(tài)觀點(diǎn)
A.溴敵隆 B.毒鼠強(qiáng) C.毒鼠硅 D.毒鼠鈉