肿瘤耐药检测存在的问题()
A.肿瘤耐药机制复杂
B.检测技术手段仍有待改进
C.患者不配合
D.药物作用在体内和体外存在差别
E.费用昂贵
参考答案:A, B, D
We first met on a train in 2000.We both felt immediately that we _____ each other for years.
A.knew
B.have known
C.had known
D.know
Access中,以下哪个不属于查询操作方式( )。
A.选择查询
B.参数查询
C.准则查询
D.操作查询