[名词解释] 倍增时间(doubling time)

间变(anaplasia) 症状表现在病灶的同侧是因损伤了（） ["A．脊髓丘脑束","B．三叉丘系","C．内囊后肢","D．内侧丘系","E．薄束、楔束"] 畸胎瘤(teratoma) 在脊髓外侧索内下行的纤维束是（） ["A．脊髓丘脑束","B．红核脊髓束","C．薄束","D．脊髓小脑束","E．以上都不是"] 髓样癌(medullary carcinoma) 倍增时间(doubling time)