A.害蟲(chóng)的基因產(chǎn)生了抗藥性而大量存活下來(lái)B.害蟲(chóng)經(jīng)過(guò)長(zhǎng)期的努力適應(yīng)了有殺蟲(chóng)劑的環(huán)境C.少數(shù)抗藥性強(qiáng)的害蟲(chóng)存活下來(lái)并大量繁殖D.該殺蟲(chóng)劑的藥效不穩(wěn)定