电网重要测点P、Q、U、I都属于遥测。
A definite advantage of using water as a fire extiguishing agent is its characteristic of（）. ["alternate expansion and contraction as water in a liquid state becomes a vapor","absorption of smoke and gases as water is converted from a liquid to a vapor","rapid contraction as water is converted from a liquid to a vapor","rapid expansion as water absorbs heat and changes to steam"]
剥离是一种（）战略。 ["增长","全球","收缩","稳定","多元化"]
柜员密码变更规定（）天变更一次。 ["30天","15天","7天","10天"]
内部效度越（），则越可能作出因变量的变化来自研究变量变化的判断。 ["小","大","中","无关"]
社会市场营销观念是什么？
