紧急断电保护是搬动断电开关后即打开常闭触头切断()电源。
A、控制电路
B、主回路
C、照明信号回路
D、总电源
参考答案:D
.Most students used to listen to their teachers in class and completely obey their teachers,__________?
A.used they
B.weren’t they
C.didn’t they
D.did they
患者,女性,20岁。言语缓慢,语量减少,语声甚低,自觉“脑子不灵活,脑子变笨”,反应慢,思考问题困难。该患者的症状属于()
A.思维迟缓
B.思维贫乏
C.思维散漫
D.思维破裂
E.思维扩散