单选:生态入侵是指人们有意识或者无意识地把某些生物带入适宜其栖息和繁衍的地区,使得该生物种群不断扩大,分布区不断稳定地扩展,从而危害当地的生产和生

题目内容:
生态入侵是指人们有意识或者无意识地把某些生物带入适宜其栖息和繁衍的地区,使得该生物种群不断扩大,分布区不断稳定地扩展,从而危害当地的生产和生活,改变当地生态环境的过程。根据上述定义,下列各项属于生态入侵的是:A.产于南美洲的凤眼莲作为观赏植物被引进我国,致使云南滇池由于凤眼莲的疯狂蔓延而鱼
A.虾绝迹
B.科学家将引进的野生大豆与当地品种杂交,培养出抗大豆萎黄病的优良品种
C.某实验室因大意将试验用的致病性菌株散播,造成周围居民染病
D.某地因发生大面积放射性核泄露而使某种植物繁殖能力超强,逐渐取代了该地域内的其他植物
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