题目

The new treatment means, if _______ to the NCR will make all the difference for the general public. A . applying B . to apply C . applied D . having applied 答案：C17．下列各项技术中能克服远缘杂交不亲和的是（　　）A．植物组织培养B．植物体细胞杂交C．动物胚胎移植D．单倍体育种