论述污水处理系统？
管理控制系统具备（）主要特征。 ["更重视共享价值观","强调全方位的奖励","更应用有效的方法来衡量绩效","要考虑控制系统的道德观"]
用于压力容器的钢材主要机械性能指标为（）。 ["强度","塑性","刚度","韧性"]
Which four statements correctly describe functions that are available in SQL? （） ["INSTR returns the numeric position of a named character.","NVL2 returns the first non-null expression in the expression list.","TRUNCATE rounds the column, expression, or value to n decimal places.","DECODE translates an expression after comparing it to each search value.","TRIM trims the heading or trailing characters (or both) from a character string.","NVL compares two expressions and returns null if they are equal, or the first expression if they are not equal.","NULLIF compares two expressions and returns null if they are equal, or the first expression if they are not equal."]
威尔逊的行政学说主要包括哪些方面的内容？
生产者、销售者的产品质量责任和义务有哪些？
