安全信息流是要认识生产和生活中的()
A、人——人信息流
B、人——机信息流
C、人——环境信息流
D、机——环境信息流
E、机—机信息流
参考答案:A, B, C, D
---How did you_____ the old valuable house?
---It used to be_____ my uncle. He left it to me in his will.
A.take possession of; in possession of
B.take the possession of; in the possession of
C.take possession of; in the possession of
D.take the possession of; in possession of
已知突触前神经元释放的某种递质可使突触后神经元兴奋,当完成一次兴奋传递后,该种递质立即被分解。某种药物可阻止该种递质的分解,这种药物的即时效应导致[ ]
A.突触前神经元持续兴奋
B.突触后神经元持续兴奋
C.突触前神经元持续抑制
D.突触后神经元持续抑制