[名词解释] 土壤

土壤质地 土壤剖面 土壤形态 生活史属于全变态的节肢动物是 ["A．蚊 ","B．虱 ","C．臭虫 ","D．蟑螂 ","E．以上均不正确 "] H-O变异是 ["A．形态变异","B．菌落变异","C．耐药性变异","D．鞭毛变异","E．毒力变异"] 土壤