题目

阅读理解Shark nets in place across Australia, specifically in NewSouth Wales (NSW) and Queensland, to protect beachgoers should be dropped asthey have caused more harm than good, a study has found. The measures were carried out by some governments, includingnets and traditional drum lines, and provided beachgoers with a false sense ofsafety. The study found the effectiveness of nets was difficult to evaluate,while the significant damage they cause to other marine wildlife was clear. Researchersdesire for nondeadly shark control measures such as eco-barriers, whichphysically separate swimme5．下列生物所获得的变异，属于不可遗传的是（　　）A．经太空育种形成的太空椒，个大质优B．经杂交育种形成的奶牛，产奶量高C．经转基因形成的超级鼠，体大生长迅速D．经充足光照形成的小麦，穗大粒饱产量高