The fishing ban is regarded as a key move to stop the _____of biological resources and degradation of biodiversity in the Yangtze River, which has been damaged by overfishing and pollution.
【单选题】"Times New Roman";mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0pt; mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">红细胞生成的原料主要为: