题目

 —How about getting a part-time job during the summer holidays? —             , but I have promised to visit my cousin in Japan.        A. No way   B. Well done  C. That sounds fine  D. No, I’m terribly sorry 答案：   C秋水仙素能诱导形成多倍体的原因是：A．诱导染色体多次复制B．抑制细胞有丝分裂时纺锤体的形成C．促使染色单体分开，形成染色体D．促进细胞分裂