The Main Disease and Pest Control Countermeasures of Cycas spp. 苏铁主要病虫害及其防治对策。
The situation of noise environment quality of constructed area of Hohhot was analyzed, and countermeasures of prevention and control to improve noise environment were put forward. 摘要对呼和浩特市市区噪声环境质量状况进行了分析，并从改善声环境方面提出防治对策。
