银川市空气污染类型为煤烟型污染。
The type of air pollution in Yinchuan is coal-burning pattern.
目的了解银川市退休职工基本医疗保障程度。
Objective To understand the security capacity of medical insurance on Yinchuan s retirees.
目的了解银川市退休职工基本医疗保障程度。
Objective To understand the security capacity of medical insurance on Yinchuan s retirees.
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