However, the Home School Legal Defense Association(DA) says the percentage of black home-schooling families has increased, though hard numbers weren't available. 然而,家庭学校法律辩护协会称,让孩子在家“上学”的黑人家庭比例有所提高,但目前还无法得到相关的确切数字。
Choosing the Type of Internal Contract of Specialized Forestry Cooperative Economic Organizations & Taking the Joint Defense Association(DA) in Protecting Forest in Youxi of Fujian Province as an Example 林业专业合作经济组织内部契约选择初探&以福建尤溪护林联防协会为例
Based on the Allied Defense Treaty of Five Nations, military cooperation of the Association of Southeast Asian Nations, military drill bases abroad, Singapore has set up a great net for safety, enabling itself to be one element of the whole. 借助五国联防协定、东盟军事合作和在海外设立训练基地,新加坡广结安全网络,成为一条融入鱼群的小鱼。
The disaster defense of urban lifeline system is estimated as a whole and the association under disaster from strong to weak is : communication system, electric power system, transport system, gas system and water system. 从整体上评价了城市生命线系统的抗灾能力,得出了灾害下城市生命线系统间的关联性从强到弱为:通讯系统、电力系统、交通系统、供气系统和供水系统。
Air defense command and decision-making based on positive / negative ideal scheme and grey association analysis 采用正负理想方案和灰色关联法进行防空指挥决策算法研究