既是病理产物又是致病因素的是（）
A.六淫
B.七情
C.劳倦
D.痰饮
E.疫疠
参考答案：D
It is time for us to listen to the teacher. Could you please ________ the radio?[ ]
A. isn't turn on
B. not turn on
C. don't turn on
特别潮湿的场所或进入金属容器内部应使用（）灯。
A、8V
B、l2V
C、24V
D、36V
