【单选题】The passage tells us that ______.
A.
computers now cannot yet tell us what symptoms a patient has
B.
computers now can remind you to turn off the lights in the basement
C.
the author has a car that can think for itself
D.
some computers now can already make loud complaints
【单选题】下列四个选项中,不属于数据库系统特点的是:
【判断题】管理信息系统跨平台运行的特点是指对不同类型的后台数据库进行直接存取操作,实现数据在不同数据库之间的传递与转换。()
【单选题】下列关于TI-Ag的描述,错误的是
A.
TI-Ag可直接刺激B细胞活化,无须Th细胞辅助,不产生记忆B细胞(Bm)。
B.
分为TI-1和TI-2两类,激活B细胞的机制不同
C.
低浓度的TI-1抗原可与B细胞表面的有丝分裂原受体结合,活化B细胞与BCR无关
D.
TI-2抗原与BCR结合使其交联帽化,从而活化B细胞。
【单选题】下列四个选项中不属于数据库系统特点的是( )
【单选题】下列选项中,不属于数据库系统特点的是( )。
【简答题】Electronic computers, which have many advantages, cannot carry out creative work and replace man.
【多选题】What cannot be learned from the passage?
A.
computers will take the place of nurses in the future
B.
it is not likely that computers can plan their own moves in chess games
C.
it is not likely that computers can perform. tasks as well as people do
D.
some programs have been written to give the computers i