公共政策评估主要是对（）所进行的评估。 ["公共政策预定目标的实现程度","公共政策制定者","公共政策输出","公共政策效果"]
The amount of fuel delivered by a unit injector is controlled by the （） ["camshaft","main spring","rack position","nozzle orifice size"]
五站硅藻土滤机在过滤利旧罐酸时要注意（）变化。 ["A.浴量","B.浴温","C.循环量","D.进酸量"]
ISO9000族标准的应用前景如何？
五站硅藻土滤机在反洗时要注意循环量，（）液位是否变化。 ["地槽","高位槽","中间槽","罐内"]
散货船横骨架式单层舷侧结构特点是什么？
