What are two features of WLSE-Express wireless management？（） ["centralized management for autonomous access points ","centralized management for lightweight access points","centralized management that requires an external AAA server ","centralized management with integrated AAA server","integration with the Location Appliance to expand real time tracking to 1500 devices for 30 days ","integration with the Location Appliance to expand real time tracking to 2500 devices for 30 day"]
苏美尔圆神像特征？
下列选项中的两种诉讼都适用举证责任倒置原则的是（） ["一般民事诉讼和行政诉讼","医疗损害赔偿和行政诉讼","医疗损害赔偿和一般民事诉讼","刑事诉讼和民事诉讼","刑事诉讼和医疗损害赔偿"]
安全技术措施等级应按下面哪种等级顺序选择（） （1）本质安全 （2）安全防护装置 （3）报警装置、警示标志等 （4）操作规程、教育、培训和个人防护用品等 ["（1）（2）（3）（4）","（1）（2）（3）（4）","（2）（4）（3）（1）","（3）（1）（4）（2）"]
怎么估算麻绳的负荷能力？
基频以下调速可以是恒压频比控制，恒定子磁通φms、恒气隙磁通φm和恒转子磁通φmr的控制方式，从机械特性和系统实现两个方面分析与比较四种控制方法的优缺点。
