Given two files, GrizzlyBear.java and Salmon.java: If both classes are in the correct directories for their packages, and the Mammal class correctly defines the findSalmon() method, which change allows this code to compile?() ["add import animals. mammals.*; at line 2 in Salmon.java","add import animals.fish.*; at line 2 in GrizzlyBearjava","add import animals.fish.Salmon.*; at line 2 in GrizzlyBear.java","add import animals. mammals.GrizzlyBear*; at line 2 in Salmon.java"]
机电传动的发展大体上经历了()阶段。 ["单电机拖动","双电机拖动","多电机拖动","成组拖动","网络拖动"]
偏瘫运动功能评定中,分离运动从Brunnstrom评定标准的哪个阶段开始出现() ["Ⅱ","Ⅲ","Ⅳ","Ⅴ","Ⅵ"]
安全阀整定压力应根据确定。() ["介质特性","操作压力","排放量","快开门安全连锁装置"]
约束带应用的适应证为() ["木僵","兴奋躁动","消极自伤","外走行为","冲动伤人"]
简述出世哲学在东汉兴盛的原因。