题目

某名贵花卉用种子繁殖会发生性状分离。为了防止性状分离并快速繁殖，可以利用该植物的一部分器官或组织进行离体培养，发育成完整植株。进行离体培养时不应采用该植株的( ) A．茎尖                    B．子房壁 C．叶片                    D．花粉粒   答案：D易受思维定势的影响，缺乏深入思考而误选。There are many examples throughout the world ______ talented players are ignored by their national managers. [     ]A. when   B. where        C. which         D. whose