意志与认知的关系（）。
A.意志指导认知
B.认知指导意志
C.意志主导认知
D.认知主导意志
参考答案：B, C
Having checked the doors were closed, and ___ all the lights were off, the boy opened the door to his bedroom.
A．why
B．that
C．when
D．ours1
对空调系统的电控部分应作哪些维护保养？
